# Welcome, Guest: Join Nairaland / LOGIN! / Trending / Recent / New
Stats: 2,865,552 members, 6,876,141 topics. Date: Monday, 23 May 2022 at 08:27 AM

## Statistic 117 Questions And Answers (no Solving Tho) - Education - Nairaland

 Statistic 117 Questions And Answers (no Solving Tho) by ABCthingx: 11:36pm On Jan 02 . Re: Statistic 117 Questions And Answers (no Solving Tho) by ABCthingx: 11:45pm On Jan 02 ALL QUESTIONS CARRY MARKS 1. The degree of peakedness of a distribution is referred to as __________a. kurtosis b. momentc. skewnessd. Histogram2. For unimodal frequency curves, which are symmetrical, the empirical relationbetween mean, median and mode is given as a. mean - mode = 3(mean median) b. mean +median = modec. mode mean = 3mediand. mean mode = mean median3. What is Pearson first coefficient of skewness? 3(mean - mode) / standard deviation 4. What is Pearson second coefficient of skewness 3 ( mean - median ) / standard deviation 5. ____ refers to the numerical description ofquantitative aspect of things A. data B. methodC. state D. number6. ____ is a technique used to present numericaldataA. data B. methodC. state D. numberAns : B. method7. ____ is the science of decision making in the faceof uncertaintyA. mathematics B. statisticsC. technology D. surveyAns: B. statistics8. ____ statistics is concerned with processing,summarizing, conclusions and presentation ofdataA. descriptive B. inferentialC. inductive D. conclusiveAns: A. descriptive9. ____statistics utilizes sample data to makeestimates, decisions and predictions about apopulationA. descriptive B. inferentialC. inductive D. conclusiveAns: B. Inferential10. ____ statistics is concerned with the method ofanalysisA. inferential B. inductiveC. analytical D. B and CAns: Option D (Analytical and inductive)11. Statistics is applied in all the following areasexceptA. Banking B. EconomicsC. military intelligenceD. none of the aboveAns: D. None of the above12. All but one is not a characteristic of statisticaldataA. must be in aggregateB. must be collected systematicallyC. must be comparableD. must be cumbersomeAns: B. Statistic must be collected systematically13. Data obtained from records isA. primary B. secondaryC. recorded D. qualitativeAns: Secondary14. ____ data are originated by an investigatorA. primary B. secondaryC. recorded D. qualitativeAns: Primary (A)15. Quantitative data is divided intoA. large and smallB. grouped and ungroupedC. interval and ratioD. nominal and ordinalAns: Interval and RatioQualitative data is divided intoA. large and smallB. grouped and ungroupedC. interval and ratioD. nominal and ordinal _____ is the set of all units or objects in a definedare of interestA. survey B. population C. census D. sampleA partition of the population is calledA. survey B. populationC. census D. sample Which of the following is not a source of dataA. direct observationB. sample surveysC. designed experimentD. population 16. The area of statistics that deals with utilizationof sample data to make estimate, decision orprediction about population isA. inferential B. inductiveC. descriptive D. intuitive17. The two types of data areA. primary and secondary dataB. quantitative and qualitative dataC. ordinal and nominalD. grouped and ungroupedAns:primary and secondary data 18. The two forms of data areA. primary and secondary dataB. quantitative and qualitative dataC. ordinal and nominalD. grouped and ungroupedAns:Quantitative and qualitative 19. Which of the following is an example of nominaldataA. car modelsB. rank in the armyC. health condition D. home town 20. Which of the following is an example of nominaldataA. model of cars B. colour of dress C. brand of soap D. beauty grades Re: Statistic 117 Questions And Answers (no Solving Tho) by ABCthingx: 12:35am On Jan 03 21. Which of the following is an example of ordinaldataA. rank in army B. types of fishC. home town D. dress colourAns: A. Rank in army22. The set of all unit or object in a defined area ofinterest isA. population B. sampleC. census D. frameAns: population23. The fractional part of the unit of the populationof area of interest isA. population B. sampleC. census D. frameAns: Sample 24. The approach used when information isrequired on every member of the population ofinterest isA. population B. sampleC. census D. micro studyAns: Census 25. The method used when an interviewer attendedan occasion and records the event on the basisof questioning the participants and observingthe event isA. direct observationB. questionnaireC. case studyD. micro studyAns: Direct Observation26. The chart that comprises of a number of equallyspaced rectangles isA. histogram B. piechartC. simple bar chart D. polygonAns: Simple Bar Chart27. ____ is a sequence of questions relevant to thedata or information being soughtA. postal B. interviewC. record D. questionnaireAns: Questionaire28. Questionnaire are usually of two parts; theclassification section and section that containA. tables and graphsB. conclusionC. appendicesD. details of the respondentAns: D. details of the respondent29. Which of the following is not a characteristic ofa questionnaire? Questions shouldA. entails calculationB. be in logical orderC. be shortD. be simple and easy to understandAns: A. Entail calculations 30. ____ contains the basic details of all members ofthe population from which sample are to bedrawnA. sample data B. sample surveyC. sample record D. sample frameAns: Sample Frame 31. The sampling design used when the populationis homogenous and fairly small and thesampling frame is complete isA. quota samplingB. simple randomC. systematic samplingD. stratified samplingAns: Systematic sampling32. The sampling design that involves dividing thepopulation into a number of non-overlappingsub-population called strata isA. quota samplingB. simple randomC. systematic samplingD. stratified samplingAns: D. Stratified sampling33. A stratified sample of size n = 60 is been takenfrom a population of size N = 400 whichconsists of 3 strata of size N1 = 200, N2 = 120and N3 = 80. If sample is to be proportional tosize of starta, how many sample should be takenfrom each strata?A. 12, 18 and 30 B. 30, 18 and 12C. 10, 15 and 25 D. 25, 15 and 10Ans: Option B 34. A skewed frequency curve with its longer tailoccurring to the left is said to haveA. zero skewnessB. negative skewnessC. moderate skewnessD. positive skewnessAns: B. Negative Skewness 35. Statistical data obtained from published sourceare calledA. primary dataB. secondary data.C. qualitative dataD. quantitative dataAns: Secondary Data 36. Raw data are collected data which have ____numericallyA. been organizedB. not been organizedC. been presentedD. been graphedAns: not been organized37. Observation that cannot be measured on anatural numerical scale but can be classifiedinto groups of categories are known asA. dataB. raw dataC. qualitative dataD. quantitative dataAns: Qualitative data 38. The following are methods of data collectionexceptA. graph B. interviewC. survey D. questionnaireAns: Graph 39. A distribution having a relatively high peak isknown asA. leptokurtic B. platykurticC. mesokurtic D. kurticAns: A. leptokurtic 40. A distribution which is moderately peaked isknown asA. leptokurtic B. platykurticC. mesokurtic D. kurticAns: C. Mesokurtic Credit: BrainStorm Group Re: Statistic 117 Questions And Answers (no Solving Tho) by ABCthingx: 1:22am On Jan 03 Some things to note Data/Data set – Set of values collected or obtained when gathering information on someissue of interest.Statistics – Collection of methods for planning experiments, obtaining data, and thenorganizing, summarizing, presenting, analyzing, interpreting the data and drawingconclusions from it. Statistics in the above sense refers to the methodology used in drawing meaningfulinformation from a data set. This use of the term should not be confused with statistics(referring to a set of numerical values) or statistics (referring to measures of descriptionobtained from a data set). Ratio scale – Level of measurement where differences and ratios are meaningful and thereis a natural zero. This is the “highest” level of measurement in terms of possible operationsthat can be performed on the data.Parameter – Characteristic or measure of description obtained from a population while Statistic is obtained from a sampleSampling frame (synonyms: "sample frame", "survey frame" – This is the actual set of unitsfrom which a sample is drawn Simple random sampling – Sampling in which each sample of a given size that can be drawnwill have the same chance of being drawn. Most of the theory in statistical inference isbased on random sampling being used.Systematic sampling – Sampling in which data is obtained by selecting every kth object,where k is approximatelyN/n.Convenience Sampling – Sampling in which data that is readily available is used e.g. surveysdone on the internet. These include quota sampling.Quota sampling – Quota sampling is performed in 4 stages.a) Stage 1: Decide which characteristics of the elements/individuals in the populationto be sampled are of importance.b) Stage 2: Decide on the categories to be sampled from. These categories aredetermined by cross-classification according to the characteristics chosen at stage 1.c) Stage 3: Decide on the overall number (quota) and numbers (sub-quotas) to besampled from each of the categories specified in step 2.d) Stage 4: Collect the information required until all the numbers (quotas) areobtained.ExampleA company is marketing a new product and needs to know how potential customers mightreact to the product.Stage 1: It is decided that age (the 3 groups under 20, 20-40, over 40) and gender(male, female) are the characteristics that will determine the sample.Stage 2: The 6 categories to be sampled from are (male under 20), (male 20-40),(male over 40), (female under 20), (female 20-40) and (female over 40).Stage 3: The numbers (sub-quotas) to be sampled are (male under 20) - 40,(male 20-40) - 60, (male over 40) - 25, (female under 20) - 35, (female 20-40) - 65and (female over 40) -30. The total quota is the total of all the sub-quotas i.e. 255.Stage 4: Visit a place where individuals to be interviewed are readily available e.g. alarge shopping center and interview people until all the quotas are filled.Quota sampling is a cheap and convenient way of obtaining a sample in a short space oftime. However, this method of sampling is not based on the laws of chance and cannotguarantee a sample that is representative of the population from which it is drawn.When obtaining a quota sample, interviewers often choose who they like (within criteriaspecifications) and may therefore select those who are easiest to interview. Thereforesampling bias can result. It is also impossible to estimate the accuracy of quota sampling(because sampling is not random) Re: Statistic 117 Questions And Answers (no Solving Tho) by ABCthingx: 3:07am On Jan 03 41. A distribution having a relatively low peak isknown asA. leptokurtic B. platykurticC. mesokurtic D. kurticAns: Platykurtic 42. Data can be represented in the following formsexceptA. raw form B. tabular formC. graphical form D. statistical formAns: Statistical 43. The following are advantages of secondary dataexceptA. the data allow for timely resultB. the data constitute the exact and moredetailed information being soughtC. the information is quickly gatheredD. the data are less expensive to collectAns: Option B 44. A skewed frequency curve with its longer tailoccurring to the right is said to haveA. zero skewnessB. negative skewnessC. moderate skewnessD. positive skewnessAns: Postive skewness 45. A bimodal frequency curve hasA. one and a half maximaB. two maximaC. half maximaD. four maximaAns: Two maxima 46. The degree of peakedness of a distribution isreferred to asA. histogram B. skewnessC. moment D. kurtosisAns: D. kurtosis 47. Data collected through enquiry, survey andinterview are known asA. primary dataB. secondary dataC. quantitativeD. qualitative dataAns: Primary data 48. The degree of asymmetry or departure fromsymmetry of a distribution is referred to asA. mean deviation B. kurtosisC. standard error D. skewnessAns: Skewness 49. A line graph of class frequencies plotted againstcorresponding class marks is referred to asA. frequency histogramB. frequency polygonC. frequency intervalD. frequency curveAns: B. frequency polygon 50. One of these describes the subject of statisticsmore adequately than others isA. it is a science of subjectB. it is a numerical science subjectC. it is a mathematical subjectD. it is a natural science subjectAns: Option B 51. The mean of a set of data is 25 and the varianceis 25.34. obtain the coefficient of variationA. 2.01 B. 20.1C. 2.01% D. 20.1%Ans: D. 20.1% CV = SD/mean * 100 = sqrt(25.34)/25 * 100 52. Determine the range of these numbers 17, 45,38, 27, 6, 48, 11, 57, 34, and 22A. 33 B. 34C. 51 D. 40Ranging = Highest value - lowest = 57 -17Ans: 40 53. _____ is the difference between the largest andsmallest number of a group of numbers isA. mode B. rangeC. mean D. modeAns: Range Obviously 54. Which of the following is not a measure ofcentral of tendencyA. mode B. rangeC. mean D. modeAns: Range 55. Which of the following is not a measure ofcentral of tendencyA. harmonic meanB. geometric meanC. modeD. varianceAns: Variance is a measure of dispersion 56. Determine the range of the numbers: 12, 56, 42,21, 5, 18, 10, 3, 61, 34, 65, and 24A. 56 B. 58C. 60 D. 62Ans: D. 62 57. The arithmetic mean of the numbers 8, 3, 5, 12,and 10 isA. 7.5 B. 7.6C. 7.7 D. 7.8Ans: 7.6 8+3+5+12+10/558. If 5, 8, 6, and 2 occur with frequencies 3, 2, 4,and 1, respectively, the arithmetic mean isA. 5.5 B. 5.6C. 5.7 D. 5.8Ans: 5.7 59. The algebraic sum of the deviations of a set ofnumbers from their arithmetic mean isA. zero B. unity C. infinite D. tenAns: Zero 60. The set of numbers 3, 4, 4, 5, 6, 8, 8, 8, and 10has medianA. 4 B. 5C. 5.5 D. 6Ans: 6 Re: Statistic 117 Questions And Answers (no Solving Tho) by ABCthingx: 7:55pm On Jan 03 61. The set of numbers 5, 5, 7, 9, 11, 12, 15, and 18has medianA. 9 B. 10C. 10.5 D. 11Ans: B. 1062. The set 2, 2, 5, 7, 9, 9, 9, 10, 10, 11, 12, and 18has modeA. 7 B. 9C. 9.5 D. 10Ans: B. 9 63. What is the mode of set 3, 5, 8, 10, 12, 15, and 16A. 10 B. 12C. 8 D. no modeAns: D. no mode64. What is the mode of set 2, 3, 4, 4, 4, 5, 5, 7, 7, 7,and 9.A. 4 B. 7 C. 4 or 7D. 4 and 7 E. none of the aboveAns: 4 and 7 65. The geometric mean of the numbers 2, 4, and 8isA. 2 B. 4C. 6 D. 8Ans: 3rt(2/4/ B66. The harmonic mean of the numbers 2, 4, and 8A. 2.43 B. 3.43C. 4.43 D. 4.43Ans: 3/(1/2 + 1/4 + 1/ B. 3.4288 67. Find the geometric mean of the numbers 3, 5, 6,6, 7, 10, and 12.A. 6 B. 6.43C. 7 D. 7.7Ans: B. 6.428368. Find the arithmetic mean of the numbers 3, 5, 6,6, 7, 10, and 12.A. 6 B. 6.43C. 7 D. 7.7Ans: C. 769. Find the mean deviation of the set 2, 3, 6, 8, 11A. 4 B. 5C. 6 D. 770. Find the harmonic mean H of the numbers 3, 5,6, 6, 7, 10, and 12A. 5.85 B. 5.86 C. 5.87D. 5.88 E. 5.89Ans: C. 5.8771. The second moment about the mean isA. mean deviationB. geometric meanC. varianceD. standard deviationAns: Variance 72. For unimodal frequency curves, which aresymmetrical, the empirical relation betweenmean, median and mode isA. mean — mode = 3(mean — median)B. mean + median = modeC. mode mean = 3medianD. mean — mode = meanAns: Option A 73. Given the following number, evaluate theaverage mean of the distribution.51, 50, 47, 50, 48, 41, 59, 68, 45, 37A. 49.6 B. 49.8C. 49.9 D. 50.1Ans: A. 49.6 74. A student receives marks of 85, 76, 93, 82 and96 in five subjects. Obtain the median markA. 96 B. *85C. 76 D. it does not existAns: B. 85 75. The variance of the numbers 4, 7, 5, 9, 8, 3, 6 isA. 9 B. 6C. 7 D. 4Ans: D. 4 76. Which of the following is not true?A. A continuous variable assumes any valuewithin an intervalB. A discrete variable is a variable that assumesonly counting set of values.C. Two sources of statistical data are quantitativeand qualitative dataD. Data are raw materials of researchAns: Option C77. The variance of the set of numbers 3, 5, 2, 6, 5, 9,5, 2, 8, 6 isA. 5.1 B. 51C. 5.43 D. 978. The harmonic mean of the numbers 3, 5, 6, 6, 7,10, 12 isA. 58.7 B. 87C. 587 D. *5.87Ans: D. Obviously 79. One of the differences between a population anda sample is thatA. a population is a subset of the units of asampleB. a sample is a subset of the units of apopulationC. a sample is a set of unitsD. a population is a set of unitsAns: Option B 80. One of the following graphical methods does notrequire at least an axis to plotA. Bar graph B. Stem and leafC. Histogram D. Dot spotAns: B. Stem and leaf Re: Statistic 117 Questions And Answers (no Solving Tho) by ABCthingx: 7:55pm On Jan 03 81. A food frequency questionaire is a questionaireto assess the type ofA. Diet B. ToxinsC. Vitamins D. All of the above82. The geometric mean of the numbers 2, 6, 9, 12A. 18 B. 6C. 5.67 D. 2.2583. What is Statistics?A. The collection, presentation, analysis, andutilization of numerical data to make inferencesand reach decisions in the face of uncertainty ineconomics, business, and other social andphysical SciencesB. The body of procedures and techniques usedto collect, present, and analyze data on which tobase decisions in the face of uncertainty orincomplete informationC. A branch of Mathematics that deals with theanalysis and interpretation of numerical data interms of samples and populationsD. All of the above84. The greater the number of intervals the more_____ is retrieved. Supply the missing word in theabove sentence.A. Information B. Class widthC. Class size D. Frequency85. The second moment about zero for the set of numbers 4, 7, 5, 9, 8, 3, 6 is A. 40 B. 28.50C. 40.00 D. 20.1686. A set of numbers consists of six 6’s, seven 7’s,eight 8’s, nine 9’s and ten 10’s. What is thearithmetic mean of the numbers?A. 6.77 B. 7.67C. 8.25 B. 9.2587. The second moment about the mean for the setof numbers 2, 5, 8, 11, 14, 17 isA. 26.25 B. 0C. 11.9 D. 31.588. 7 pupils of average age 12years leave a class of25 pupils of average age 14years. if 6 new pupilsof average age 11 years join the class, what isthe average age of pupils now in the class?A. 13years 10months B. 12yearsC. 12years 10months D. 13yearsdunno, I got 13years 7 months 89. In correlation analysis, a correlation coefficient(r = 1) is an indication of which type ofrelationship?A. Zero correlationB. CurveC. Nonlinear correlationD. *Positive perfect correlation90. Which of the following is not a method of datagatheringA. ExperimentationB. Paper and pencilC. InterviewD. Observation91. Given the following class intervals:50.00 - 59.99, 60.00 - 69.99, 70.00 - 79.99, 80.00- 89.99.The class mark of the second class isA. 79.95 B. 75.5C. 77.10 D. 64.99592. Types of Price index include the followingexceptA. Gross Domestic Product DeflatorB. Consumer Price IndexC. Producer Price IndexD. Demand Price Index93. The degree of asymmetry or departure fromsymmetry of a distribution is referred to asA. kurtosis B. skewnessC. standard error D. mean deviation94. Representation of data in which every observedvalue is paired with its relative frequency iscalledA. frequency distribution tableB. cummulative frequency distribution table C. relative frequency distribution tableD. cummulative distribution table95. Which of the following statements is notcorrect?A. A frequency polygon is a line graph of classmark obtained by connecting the classfrequenciesB. A line graph is needed for a frequency polygonC. A frequency polygon is a line graph of classfrequencies obtained by connecting the midpoints of the tops of the rectangles forming ahistogramD. A straight line is needed for a frequencypolygon96. In a class of 120 students, 18 of them scored an"A" grade. If the section representing the "A"grade students on a pie chart has angle Z at thecentre of the circle, what is Z?A. 15 B. 54C. 50 D. 2797. Given that for a distribution of wages datamean = \$79.76,median = \$79.06,mode = \$77.50,standard deviation = \$15.60.Find the Pearson’s first coefficient of skewnessA. 145 B. 14.48C. 0.14 D. 1.4498. The largest of a set of 50 measurements is8.34kg. If the range is 0.46kg, find the smallestmeasurement.A. 78kg B. 7.88kgC. 8.5kg D. 82kg99. The second moment about the mean of the set ofnumbers 2, 3, 7, 8, 10 isA. 92.10 B. 9.25C. 11.50 D. 19.21100. Find the sum of the range and the mode of theset of numbers 10, 5, 10, 9, 8, 7, 7, 10, 8, 4,6, 9, 10, 9, 10, 9, 7, 10, 6, 5.A. 16 B.14C. 12 D. 10 Re: Statistic 117 Questions And Answers (no Solving Tho) by ABCthingx: 7:56pm On Jan 03 101. Dot plot, Stem and leaf and Histogram can all beused to describe onlyA. Qualitative dataB. Secondary dataC. Quantitative data D. Primary data 102. A student received the following grades on the10 quizzes he took during a semester 6, 7, 6, 8,5, 7, 6, 9, 10 and 6. Which of these statements istrue of median from this distribution?A. 5.5 B. 5.5th item C. 6 or 7 D. 6.5th item103. Given that for a distribution of wages datamean = \$79.76,median = \$79.06,mode = \$77.50,standard deviation = \$15.60.Find the Pearson’s second coefficient ofskewness A. 0.14 B. 145C. 1.44 D. 14.48104. A tabular arrangement of data by classestogether with the corresponding classfrequencies is called A. Frequency table B. Frequency distributionC. All of the aboveD. None of the above105. The mean of four numbers is 5 and the meandeviation is 3. Find the fourth number if themean deviation of the first three number is 2A. 11 B. 6 C. 10 D. 27106. The second moment about 1 for the set ofnumbers 2, 3, 7, 8, 10 isA. 45.21 B. 36.6C. 4.52 D. 34.20 107. A population is defined statically as a set ofA. Things B. Units items C. Animals D. Human being108. Raw data are collected data which have ______numericallyA. been graphed B. not been organized C. been organizedD. been presented109. The advantages of secondary data include thefollowing exceptA. They are less expensive.B. The data allow for timely results.C. The data usually involve loss of details. D. The information is quickly gathered.110. Suppose you are given a data set that classifieseach sample unit into one of four categories A, B,C, D. If you decide to code the data as A = 1, B =2, C = 3, D = 4. The data consisting of A, B, C, and D are described asA. Qualitative B. NumericalC. Quantitative D. Primary111. The mean of twelve positive numbers is 3. Whenanother number is added, the mean becomes 5.Find the thirteenth numberA. 29 B. 28 C. 27D. 26 E. 25Should be 24 na 112. Calculate the harmonic mean of the followingnumbers. 100, 47, 96, 80, 3, 1, 10, 2A. 1.0984 B. 2.0987C. 3.3456 D. 4.0251 113. The series of 16 students in STA117 for2009/2010 academic session are: 65, 65, 55, 60,60, 65, 60, 70, 75, 70, 65, 70, 60, 65, 65, 70. Whatis the sum of the median and modal scores A. 130 B. 140C. 150 D. 160114. One of the following is a class or major class ofdata A. Quantitative data B. ObservationC. IntervalD. Experimental data115. The second moment about origin for the set ofnumbers 3, 2, 4, 1, 5 isA. 55 B. 11 C. 4 D. 18116. A student receives marks of 85, 76, 93, 82 and96 in five subjects. Obtain the modal markA. 76 C. 432 C. it does not exist D. 86.4117. Find the harmonic mean and the geometricmean of 2, 4 and 8A. 4 and 3.43 B. 34.3 and 3C. 3 and 34.3 D. 3.43 and 4 118. Given the following class intervals:50.00 - 59.99, 60.00 - 69.99, 70.00 - 79.99, 80.00- 89.99. The class mark of the third class isA. 77.50 B. 79.68 C. 74.995 D. 65.78119. Evaluate the median of the set of data below 18,10, 15, 13, 17, 15, 12, 15, 18, 16, 11A. 13 B.14 C. 15 D. 16120. Data collected through telephone enquiry,survey and interview are known as A. primary data B. qualitative data C. secondary dataD. quantitative data121. Experimental data is always aA. Qualitative data B. Primary data C. Quantitative dataD. Secondary data122. Suppose that we have data on the incomes of1000 Nigerian families. This body of data can besummarized by finding the average familyincome and the spread of these family incomesabove and below the average. The data also canbe described by constructing a table, chart, orgraph of the number or proportion of families ineach income class. What aspect of statistics isthis?A. Inferential statisticsB. Elementary statisticsC. Introductory statisticsD. Descriptive statistics 123. Which of the following is true for a unimodalfrequency curve? A. mean — mode = 3(mean — median) B. mean + median = modeC. mode mean = 3medianD. mean — mode = mean124. Find the geometric mean of 5, 10, 15. A. 9.09 B. 9.20C. 2.97 D. 2.90125. Marks scored by some student in arithmetic testare 5, 3, 6, 9, 4, 7, 8, 6, 2, 7, 8, 4, 5, 2, 1, 0, 6, 9, 0,8. The arithmetic mean of the marks isA. 6 B. 5 C. 8 D. 9126. Both circles and rectangles can be used to plot ahistogramA. True B. False no na.. 127. The harmonic mean of the numbers 3, 2, 5, 6 isA. 2.90 B. 3.33 C. 6.9 D. 3.8128. A random sample of seven observations wastaken from a population of 100 observations.The results were as follows: 14, 19, 15, 18, 10,13 and 16. Calculate the standard deviation ofthe observationsA. 3.06 B. 3.90C. 2.83 D. 2.54129. The unknown intercept parameter in a linearregression model determines A. the value of the dependent variable when theeffect of the independent variable is zero B. the value of the independent variable whenthe effect of the dependent variable is zero.C. the relationship between the dependentvariable and the error term.D. the relationship between the independentvariable and the error term130. Which of the following statements is not true?A. The width of the bar rectangle could be of anyconvenient sizeB. All the bars must have the same width andthey should overlapC. A bar chart is a series of rectangles whoseheights are drawn proportionally to the valuesthat are being represented or assessedD. The heights of the bars should be drawn toscale to show the relative measurements131. The use of published data as reference for yoursurvey work is an exampleA. Tertiary dataB. Primary data C. Secondary data D. Universal data132. The difference between a census and a survey isthatA. Census require enumerating every unit of thepopulation B. Survey is used when an information isrequired about a populationC. Census require identifying the population ofinterestD. Survey required trained personnel133. Find the second moment of the set 2, 3, 7, 8, 10.A. 6.9 B. 10.3 C. 45.2 D. 3.4134. Given the regression line of y = 6 + 5x. obtainthe estimate of y if x = 2 A. 16 B. 17C. 18 D. 19135. The standard deviation of the numbers 3, 6, 2, 1,7, 5 isA. 12 B. 2.16 C. 3.87 D. 5136. The Pearson’s first coefficient of skewness isgiven byA. skewness = mean − modestandard deviation B. skewness = 3(mean − mode)standard deviationC. skewness = mean − medianstandard deviationD. skewness = 3( mean − median)standard deviation137. The Pearson’s second coefficient of skewness isgiven byA. skewness = mean − modestandard deviationB. skewness = 3(mean − mode)standard deviationC. skewness = mean − medianstandard deviationD. skewness = 3( mean − median)standard deviation 138. The third moment about the mean for the set ofnumbers 5, 7, 4, 6, 3, 8, 9 isA. 0.4 B. 0C. 25 D. 4139. All of the following are branches of statisticsexcept one which is a sub branch A. Biostatistics B. BiometricsC. EconomitricsD. Quality control140. Suppose that we have data on the incomes of1000 Nigerian families. If these 1000 familiesare representative of all Nigerian families, wecan then estimate and test hypotheses about theaverage family income in Nigerian as a whole.Since this conclusion are subject to error, wealso would have to indicate the probability oferror. What aspect of statistics is this?A. Elementary statisticsB. Introductory statistics C. Inferential statistics D. Descriptive statistic Re: Statistic 117 Questions And Answers (no Solving Tho) by ABCthingx: 7:59pm On Jan 03 141. Statistical data obtained from hospital recordsare calledA. qualitative dataB. primary dataC. quantitative data.D. secondary data 142. A random sample of seven observations wastaken from a population of 100 observations.The results were as follows: 14, 19, 15, 18, 10,13, and 16. Calculate the variance of theobservationsA. 7 B. 8 C. 9 D. 10143. Which of the following measures can we use toobtain the strength of the relationship betweentwo or more variables when our data are oninterval scale?A. coefficient of determinationB. RegressionC. Spearman’s coefficient of rank correlation D. Pearson’s product moment correlationcoefficient. 144. If 5, 8, 6 and 2 occur with frequencies 3, 2, 4 and1 respectively, Find the product of the modaland the median numbersA. 42 B. 37C. 44 D. 47145. The range of the set of numbers 2, 3, 3, 5, 5, 5, 8,10, 12 isA. 53 B. 1 C. 10 D. 100146. In statistical analysis of data involving two ormore variables, the degree of relationshipbetween the variables can be measured byA. coefficient of variationB. regression equationC. correlation coefficient D. absolute measure of spread147. Statistical data obtained from hospital recordsare calledA. quantitative data.B. qualitative dataC. secondary data D. primary data148. In a class of 150 students, the sector in a piechart representing the students offering STA117has angle 12 degree. How many students areoffering STA117?A. 4 B. 5 C. 5.5 D. 6.5149. The first moment about the origin 4 for the setof numbers 2, 3, 7, 8, 10 isA. 12 B. 3C. 2 D. 13150. The mean of the numbers 1.2, 1.0, 0.9, 1.4, 0.8,0.8, 1.2 and 1.1 isA. 1.05 B. 1.02C. 1.0 D. 0.8151. The difference between a nominal and a ratioscale of measurement is that a ratio scale ofmeasurement has A. unit of measurement B. decimal pointC. whole numberD. origin152. The first moment about the origin for the set ofnumbers 2, 3, 7, 8, 10 isA. 6 B. 3C. 4 D. 5153. Observations that cannot be measured on anatural numerical scale but can be classifiedinto groups of categories are known as?A. Raw dataB. DataC. Quantitative DataD. Qualitative Data 154. Which of these is not a characteristic of ahistogram?A. The areas of the rectangles are proportional tothe class mark B. All the rectangles have their centers on theclass markC. All the rectangles having their bases on thehorizontal axisD. The areas of the rectangles are proportional tothe class frequencies155. The mean of the set of numbers 12, 6, 7, 3, 15,10, 18, 5 isA. 4.87 B. 48.7C. 9.50 D. 23.716156. Quartile is a measure ofA. Scale B. PartitionC. Dispersion D. Central tendency157. Which of the following measures can we use toobtain the strength of the relationship betweentwo or more variables when our data are oninterval scale?A. Spearman’s coefficient of rank correlationB. RegressionC. coefficient of determinationD. Pearson’s product moment correlationcoefficient 158. The Geometric mean of the numbers 3, 5, 6, 6 isA. 6.43 B. 4.82 C. 5.41 D. 0.643159. A students final marks in MAT111, PHY113,GST110 and STA117 are respectively 82, 86, 90and 70. If the respective credits received forthese course are 3, 5, 3 and 1. Determine anapproximate mean markA. 84.3 B. 85.4B. 84.7 D. 84160. In studying a population the characteristics ofinterest is referred to asA. Respondent B. Variable C. Property D. Response Re: Statistic 117 Questions And Answers (no Solving Tho) by ABCthingx: 8:00pm On Jan 03 161. The following are methods of data collectionexceptA. interview B. observation C. Graph D. questionnaire162. The third moment about the origin 4 for the setof numbers 3, 2, 4, 1, 5 isA. 3 B. 4.3 C. -7 D. 7163. Which of these is not true?A. Skewness is the degree of asymmetry of adistribution.B. For skewed distributions, the mean tends tolie on the same side of the mode as the longertail.C. Kurtosis is the degree of peakedness of adistribution. D. If the frequency curve of a distribution has alonger tail to the right, then the distributionnegatively skewed. 164. Find the mean deviation of the set of numbers 4,5, 9.A. 6 B. 5 C. 2 D. 0165. Find the geometric mean of the following set ofdata. 3, 3, 1, 9A. 1 B. 2 C. 3 D. 4166. What is the mean deviation of 3, 5, 8, 11, 12 and21? A. 4.7 B. 60C. 3.7 D. 10167. When the population of interest is partitionedinto sets of homogenous sub-population, themethod of sampling techniques used is calledA. Simple random samplingB. Cluster sampling C. Stratified random sampling D. Double sampling168. Out of 100 numbers, 20 were 4's, 40 were 5's,30 were 6's, and the remainder were 7's. Findthe arithmetic mean of the numbers. A. 5.3 B. 53.3C. 0.53 D. 533169. The arithmetic mean of the numbers 5, 3, 6, 5, 4,5, 2, 8, 6, 5, 4, 8, 3, 4, 5, 4, 8, 2, 5, 4 is A. 4.8 B. 67C. 6.7 D. 6.8170. The third moment about the mean for the set ofnumbers 5, 7, 4 ,6, 3, 8, 9 is A. 0 B. 1C. 2 D. 3 E. 4171. The degree of peakedness of a distribution isreferred to asA. moment B. histogramC. skewness D. kurtosis 172. If Musa scored 75 in STA117 instead of 57, hisaverage mark in four courses would have been60. What was is totalA. 222 B. 223C. 224 D. 225173. If the mean of numbers 0, x+2, 3x+6 and 4x+8is 4, find their mean deviationA. 2 B. 0C. 3 D. 4174. Observations that cannot be measured on anatural numerical scale but can be classifiedinto groups of categories are known as?A. Qualitative data B. Quantitative dataC. DataD. Raw data175. The difference between a population and asample is thatA. Sample is a subset of a population B. Sample is less tedious and unexpensive aspopulationC. Sample can be studied in a surveyD. Population required trained personnel forenumeration176. The sectorial allocations to various ministries ina state budget are as follows agriculture-#25,000,000.00, education-#20,000,000.00women affairs-#35,000,000.00 commerce andindustries-#20,000,000.00. In a pie chart torepresent this information, the correspondingangle to agriculture isA. 45 B. 60 C. 90 D. 180177. A skewed distribution has the followingcharacteristics exceptA. It has mean, mode and median at the same spot in the distributionB. It has skew coefficient not equals to zeroC. It can be analyses using an appropriate nonparametric testD. It does not meet the normalities assumption178. The range of the set of numbers 2, 3, 3, 5, 5, 5, 8,10, 12 isA. 100 B. 10 C. 1 D. 53179. 4, 16, 30, 20, 10, 14 and 26 are represented on apie chart. Find the sum of the angles of thesectors representing all numbers equal to orgreater than 1A. 276 B. 360 C. 48 D. 299180. The geometric mean of the set 1, 2, 3, 4 and 0 isA. 2.21 B. 1.89C. 3.14 D. 0181. Quantitative data is divided in toA. large and smallB. grouped and ungroupedC. interval and ratioD. nominal and ordinal182. Qualitative data is divided in toA. large and smallB. grouped and ungroupedC. interval and ratioD. nominal and ordinal183. The measurement of temperature is groupedunderA. interval B. ratioC. nominal D. ordinal184. The army ranks can be classified asA. interval B. ratioC. nominal D. ordinal185. The death rate is a ______ data.A. interval B. ratioC. nominal D. ordinal186. The rate of accident is classified asA. interval B. ratioC. nominal D. ordinal187. The I phone series is a good example of _____data.A. interval B. ratioC. nominal D. ordinal188. Types of fish is an example ofA. interval B. ratioC. nominal D. ordinal189. The candidates JAMB score is a _____ data.A. interval B. ratioC. nominal D. ordinal190. A _____ is the set of all units or objects in adefined area of interest.A. survey B. populationC. census D. sample191. A portion of population is calledA. survey B. populationC. census D. sample192. One these is not an advantage of SamplingA. time saving B. cost minimizationC. precision D. bulky193. Which of the following is not a source of data?A. direct observation B samplesurveyC. designed experiment D. none of theabove194. A method of data collection where an analystgoes to the field an investigate is known asA. direct observation B samplesurveyC. designed experiment D. published source195. Data collected from a published source is alsoknown as _____.A. primary data B. secondary data.C. qualitative data D. quantitative data196. The difference between the minimum andmaximum value of a data is known as theA. mean B. medianC. mode D. range197. A _____ contains the basic details of all membersof the population from which sample are to bedrawnA. sampling data B. sample frameC. sampling design D. sampling method198. _____ is not an example of sampling designA. Simple random B. StratifiedC. Multi stage D. Variable199. ____ sampling allows every member to haveequal chance of pickingA. Simple random B. StratifiedC. Multi stage D. Systematic200. In systematic sampling if x = 9 and k = 5, thenext three members areA. 5, 14, 23 B. 9, 14, 19C. 14, 19, 24 D. 14, 23, 32Use the information below to answer the nextthree (3) questions.A sample size of 50 is to be selected from apopulation of 1000 using systematic sampling201. What is the range of the first member?A. 0 - 20 B. 0 -19C. 1 – 19 D. 1 – 20202. What is the value of the common difference k?A. 10 B. 19C. 20 D. 21203. What is the first three members if the firstmember is 17A. 17, 37, 57 B. 17, 34, 51C. 17, 36, 56 D. 37, 57, 77Use the information below to answer the nextthree (3) questions.In a population of 3000, a sample size of 70 is tobe selected using systematic sampling204. Which of the following can be picked as the firstmember?A. 42 B. 43 C. 69 D. 70205. What is the range of the first member?A. 0 – 42 B. 1 – 42C. 0 – 43 D. 1 – 43206. If the first member is 23, what is the next threenumbersA. 23, 93, 163 B. 92, 162, 232C. 93, 163, 233 D. 23, 93, 1631 2 3A 2,000 1,200 800B 25,000 20,000 15,000Use the table above to answer the next 10questions.Using stratified method of sampling, themembers in a population (i.e. A and B) weregrouped in to three (3) strata. The sample sizefor A and B are 60 and 120 respectively.207. What is the population size of group A?A. 2000 B. 3200C. 4000 D. 5000208. How many samples will be taken from stratum 1in group AA. 6 B. 12 C. 18 D. 30209. How many samples will be taken from stratum 3in group AA. 6 B. 12 C. 18 D. 30210. What is the population size of group B?A. 40,000 B. 50,000C. 55,000 D. 60,000211. How many samples will be taken from stratum 2in group BA. 30 B. 40 C. 50 D. 60212. How many samples will be taken from stratum 3in group BA. 30 B. 40 C. 50 D. 60213. A sampling method that involves dividing intostages is called _____ sampling.A. Simple random B. StratifiedC. Multi stage D. Systematic Re: Statistic 117 Questions And Answers (no Solving Tho) by ABCthingx: 1:50am On Jan 09 Lol boldening text is hard Re: Statistic 117 Questions And Answers (no Solving Tho) by Zico5(m): 9:47am On Jan 09 This is commendable Re: Statistic 117 Questions And Answers (no Solving Tho) by Obinoscopy(m): 5:10am On Jan 10 Awesome.I myself have a question: A class has 50 boys and 50 girls. If the average age of boys in the class is 15 years and the average age of girls is 13 years. If I randomly select a boy and a girl from that class, who will be older? A. The BoyB. The GirlC. Impossible to tellD. None of the above Re: Statistic 117 Questions And Answers (no Solving Tho) by Nostradamus1: 8:43am On Jan 10 Obinoscopy:Awesome.I myself have a question: A class has 50 boys and 50 girls. If the average age of boys in the class is 15 years and the average age of girls is 13 years. If I randomly select a boy and a girl from that class, who will be older? A. The BoyB. The GirlC. Impossible to tellD. None of the aboveC 1 Like Re: Statistic 117 Questions And Answers (no Solving Tho) by Obinoscopy(m): 7:07am On Jan 11 Nostradamus1:CCorrect Re: Statistic 117 Questions And Answers (no Solving Tho) by ABCthingx: 4:16pm On Jan 11 Obinoscopy:Awesome.I myself have a question: A class has 50 boys and 50 girls. If the average age of boys in the class is 15 years and the average age of girls is 13 years. If I randomly select a boy and a girl from that class, who will be older? A. The BoyB. The GirlC. Impossible to tellD. None of the aboveIt's more likely that boy will be older Re: Statistic 117 Questions And Answers (no Solving Tho) by ABCthingx: 4:17pm On Jan 11 Zico5:This is commendableThanks Re: Statistic 117 Questions And Answers (no Solving Tho) by Obinoscopy(m): 4:47pm On Jan 11 ABCthingx:It's more likely that boy will be olderThat's true but we can't say with certainty that the boy will be older. Re: Statistic 117 Questions And Answers (no Solving Tho) by Obinoscopy(m): 4:56pm On Jan 11 Another question:Let's imagine, a class of only 5 girls with ages: 9, 11, 13, 15 and 17 years. If we are told to select three girls out of the class. What do you are think are the total number of possible selections that can be done? Re: Statistic 117 Questions And Answers (no Solving Tho) by Nostradamus1: 9:11pm On Jan 11 Obinoscopy:Another question:Let's imagine, a class of only 5 girls with ages: 9, 11, 13, 15 and 17 years. If we are told to select three girls out of the class. What do you are think are the total number of possible selections that can be done?This should be combination i think so 5C3 which gives 10Manual method checks 1 Like Re: Statistic 117 Questions And Answers (no Solving Tho) by Obinoscopy(m): 6:04am On Jan 12 Nostradamus1:This should be combination i think so 5C3 which gives 10Manual method checksCorrect! You are on fire man!Okay, here is a followup question. Assuming we calculate the mean of each of the 10 possible selections, what do you think will be the overall mean of those 10 values/means? No calculation, just tell me what you think the answer will be. Re: Statistic 117 Questions And Answers (no Solving Tho) by Nostradamus1: 10:50am On Jan 12 Obinoscopy:Correct! You are on fire man!Okay, here is a followup question. Assuming we calculate the mean of each of the 10 possible selections, what do you think will be the overall mean of those 10 values/means? No calculation, just tell me what you think the answer will be.I guess it should be the same as the mean of the initial 5 numbers . Re: Statistic 117 Questions And Answers (no Solving Tho) by Obinoscopy(m): 3:17pm On Jan 12 Nostradamus1:I guess it should be the same as the mean of the initial 5 numbers .Correct! If you check it out manually, you'll see the mean is 13 which is the mean if the initial 5 numbers. You are really on fire man....lol.Ok, next question. What do you think the median and mode of those 10 values/means will be? Re: Statistic 117 Questions And Answers (no Solving Tho) by Nostradamus1: 3:48pm On Jan 12 Obinoscopy:Correct! If you check it out manually, you'll see the mean is 13 which is the mean if the initial 5 numbers. You are really on fire man....lol.Ok, next question. What do you think the median and mode of those 10 values/means will be? median is definitely 13 but the mode will probably be multimodal since all the initial ntmbers occur once. Re: Statistic 117 Questions And Answers (no Solving Tho) by Obinoscopy(m): 6:54pm On Jan 12 Nostradamus1: median is definitely 13 but the mode will probably be multimodal since all the initial ntmbers occur once.Yes the median is 13.Regarding the mode, let's do it manually:Selection 1: 9, 11, 13 (mean is 11)Selection 2: 9, 11, 15 (mean is 11.7)Selection 3: 9, 11, 17 (mean is 12.3)Selection 4: 9, 13, 15 (mean is 12.3)Selection 5: 9, 13, 17 (mean is 13)Selection 6: 9, 15, 17 (mean is 13.7)Selection 7: 11, 13, 15 (mean is 13)Selection 8: 11, 13, 17 (mean is 13.7)Selection 9: 11, 15, 17 (mean is 14.3)Selection 10: 13, 15, 17 (mean is 15)You are right, it's multimodal (12.3, 13 and 13.7). I actually thought it would be a mode of 13.