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Statistic 117 Questions And Answers (no Solving Tho) by ABCthingx: 11:36pm On Jan 02 
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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. moment c. skewness d. Histogram 2. For unimodal frequency curves, which are symmetrical, the empirical relation between mean, median and mode is given as a. mean  mode = 3(mean median) b. mean +median = mode c. mode mean = 3median d. mean mode = mean median 3. 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 of quantitative aspect of things A. data B. method C. state D. number 6. ____ is a technique used to present numerical data A. data B. method C. state D. number Ans : B. method 7. ____ is the science of decision making in the face of uncertainty A. mathematics B. statistics C. technology D. survey Ans: B. statistics 8. ____ statistics is concerned with processing, summarizing, conclusions and presentation of data A. descriptive B. inferential C. inductive D. conclusive Ans: A. descriptive 9. ____statistics utilizes sample data to make estimates, decisions and predictions about a population A. descriptive B. inferential C. inductive D. conclusive Ans: B. Inferential 10. ____ statistics is concerned with the method of analysis A. inferential B. inductive C. analytical D. B and C Ans: Option D (Analytical and inductive) 11. Statistics is applied in all the following areas except A. Banking B. Economics C. military intelligence D. none of the above Ans: D. None of the above 12. All but one is not a characteristic of statistical data A. must be in aggregate B. must be collected systematically C. must be comparable D. must be cumbersome Ans: B. Statistic must be collected systematically 13. Data obtained from records is A. primary B. secondary C. recorded D. qualitative Ans: Secondary 14. ____ data are originated by an investigator A. primary B. secondary C. recorded D. qualitative Ans: Primary (A) 15. Quantitative data is divided into A. large and small B. grouped and ungrouped C. interval and ratio D. nominal and ordinal Ans: Interval and Ratio Qualitative data is divided into A. large and small B. grouped and ungrouped C. interval and ratio D. nominal and ordinal _____ is the set of all units or objects in a defined are of interest A. survey B. population C. census D. sample A partition of the population is called A. survey B. population C. census D. sample Which of the following is not a source of data A. direct observation B. sample surveys C. designed experiment D. population 16. The area of statistics that deals with utilization of sample data to make estimate, decision or prediction about population is A. inferential B. inductive C. descriptive D. intuitive 17. The two types of data are A. primary and secondary data B. quantitative and qualitative data C. ordinal and nominal D. grouped and ungrouped Ans:primary and secondary data 18. The two forms of data are A. primary and secondary data B. quantitative and qualitative data C. ordinal and nominal D. grouped and ungrouped Ans:Quantitative and qualitative 19. Which of the following is an example of nominal data A. car models B. rank in the army C. health condition D. home town 20. Which of the following is an example of nominal data A. 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 ordinal data A. rank in army B. types of fish C. home town D. dress colour Ans: A. Rank in army 22. The set of all unit or object in a defined area of interest is A. population B. sample C. census D. frame Ans: population 23. The fractional part of the unit of the population of area of interest is A. population B. sample C. census D. frame Ans: Sample 24. The approach used when information is required on every member of the population of interest is A. population B. sample C. census D. micro study Ans: Census 25. The method used when an interviewer attended an occasion and records the event on the basis of questioning the participants and observing the event is A. direct observation B. questionnaire C. case study D. micro study Ans: Direct Observation 26. The chart that comprises of a number of equally spaced rectangles is A. histogram B. piechart C. simple bar chart D. polygon Ans: Simple Bar Chart 27. ____ is a sequence of questions relevant to the data or information being sought A. postal B. interview C. record D. questionnaire Ans: Questionaire 28. Questionnaire are usually of two parts; the classification section and section that contain A. tables and graphs B. conclusion C. appendices D. details of the respondent Ans: D. details of the respondent 29. Which of the following is not a characteristic of a questionnaire? Questions should A. entails calculation B. be in logical order C. be short D. be simple and easy to understand Ans: A. Entail calculations 30. ____ contains the basic details of all members of the population from which sample are to be drawn A. sample data B. sample survey C. sample record D. sample frame Ans: Sample Frame 31. The sampling design used when the population is homogenous and fairly small and the sampling frame is complete is A. quota sampling B. simple random C. systematic sampling D. stratified sampling Ans: Systematic sampling 32. The sampling design that involves dividing the population into a number of nonoverlapping subpopulation called strata is A. quota sampling B. simple random C. systematic sampling D. stratified sampling Ans: D. Stratified sampling 33. A stratified sample of size n = 60 is been taken from a population of size N = 400 which consists of 3 strata of size N1 = 200, N2 = 120 and N3 = 80. If sample is to be proportional to size of starta, how many sample should be taken from each strata? A. 12, 18 and 30 B. 30, 18 and 12 C. 10, 15 and 25 D. 25, 15 and 10 Ans: Option B 34. A skewed frequency curve with its longer tail occurring to the left is said to have A. zero skewness B. negative skewness C. moderate skewness D. positive skewness Ans: B. Negative Skewness 35. Statistical data obtained from published source are called A. primary data B. secondary data. C. qualitative data D. quantitative data Ans: Secondary Data 36. Raw data are collected data which have ____ numerically A. been organized B. not been organized C. been presented D. been graphed Ans: not been organized 37. Observation that cannot be measured on a natural numerical scale but can be classified into groups of categories are known as A. data B. raw data C. qualitative data D. quantitative data Ans: Qualitative data 38. The following are methods of data collection except A. graph B. interview C. survey D. questionnaire Ans: Graph 39. A distribution having a relatively high peak is known as A. leptokurtic B. platykurtic C. mesokurtic D. kurtic Ans: A. leptokurtic 40. A distribution which is moderately peaked is known as A. leptokurtic B. platykurtic C. mesokurtic D. kurtic Ans: 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 some issue of interest. Statistics – Collection of methods for planning experiments, obtaining data, and then organizing, summarizing, presenting, analyzing, interpreting the data and drawing conclusions from it. Statistics in the above sense refers to the methodology used in drawing meaningful information 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 description obtained from a data set). Ratio scale – Level of measurement where differences and ratios are meaningful and there is a natural zero. This is the “highest” level of measurement in terms of possible operations that can be performed on the data. Parameter – Characteristic or measure of description obtained from a population while Statistic is obtained from a sample Sampling frame (synonyms: "sample frame", "survey frame" – This is the actual set of units from which a sample is drawn Simple random sampling – Sampling in which each sample of a given size that can be drawn will have the same chance of being drawn. Most of the theory in statistical inference is based on random sampling being used. Systematic sampling – Sampling in which data is obtained by selecting every kth object, where k is approximately N/n. Convenience Sampling – Sampling in which data that is readily available is used e.g. surveys done 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 population to be sampled are of importance. b) Stage 2: Decide on the categories to be sampled from. These categories are determined by crossclassification according to the characteristics chosen at stage 1. c) Stage 3: Decide on the overall number (quota) and numbers (subquotas) to be sampled from each of the categories specified in step 2. d) Stage 4: Collect the information required until all the numbers (quotas) are obtained. Example A company is marketing a new product and needs to know how potential customers might react to the product. Stage 1: It is decided that age (the 3 groups under 20, 2040, 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 2040), (male over 40), (female under 20), (female 2040) and (female over 40). Stage 3: The numbers (subquotas) to be sampled are (male under 20)  40, (male 2040)  60, (male over 40)  25, (female under 20)  35, (female 2040)  65 and (female over 40) 30. The total quota is the total of all the subquotas i.e. 255. Stage 4: Visit a place where individuals to be interviewed are readily available e.g. a large 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 of time. However, this method of sampling is not based on the laws of chance and cannot guarantee 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 criteria specifications) and may therefore select those who are easiest to interview. Therefore sampling 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 is known as A. leptokurtic B. platykurtic C. mesokurtic D. kurtic Ans: Platykurtic 42. Data can be represented in the following forms except A. raw form B. tabular form C. graphical form D. statistical form Ans: Statistical 43. The following are advantages of secondary data except A. the data allow for timely result B. the data constitute the exact and more detailed information being sought C. the information is quickly gathered D. the data are less expensive to collect Ans: Option B 44. A skewed frequency curve with its longer tail occurring to the right is said to have A. zero skewness B. negative skewness C. moderate skewness D. positive skewness Ans: Postive skewness 45. A bimodal frequency curve has A. one and a half maxima B. two maxima C. half maxima D. four maxima Ans: Two maxima 46. The degree of peakedness of a distribution is referred to as A. histogram B. skewness C. moment D. kurtosis Ans: D. kurtosis 47. Data collected through enquiry, survey and interview are known as A. primary data B. secondary data C. quantitative D. qualitative data Ans: Primary data 48. The degree of asymmetry or departure from symmetry of a distribution is referred to as A. mean deviation B. kurtosis C. standard error D. skewness Ans: Skewness 49. A line graph of class frequencies plotted against corresponding class marks is referred to as A. frequency histogram B. frequency polygon C. frequency interval D. frequency curve Ans: B. frequency polygon 50. One of these describes the subject of statistics more adequately than others is A. it is a science of subject B. it is a numerical science subject C. it is a mathematical subject D. it is a natural science subject Ans: Option B 51. The mean of a set of data is 25 and the variance is 25.34. obtain the coefficient of variation A. 2.01 B. 20.1 C. 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 22 A. 33 B. 34 C. 51 D. 40 Ranging = Highest value  lowest = 57 17 Ans: 40 53. _____ is the difference between the largest and smallest number of a group of numbers is A. mode B. range C. mean D. mode Ans: Range Obviously 54. Which of the following is not a measure of central of tendency A. mode B. range C. mean D. mode Ans: Range 55. Which of the following is not a measure of central of tendency A. harmonic mean B. geometric mean C. mode D. variance Ans: 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 24 A. 56 B. 58 C. 60 D. 62 Ans: D. 62 57. The arithmetic mean of the numbers 8, 3, 5, 12, and 10 is A. 7.5 B. 7.6 C. 7.7 D. 7.8 Ans: 7.6 8+3+5+12+10/5 58. If 5, 8, 6, and 2 occur with frequencies 3, 2, 4, and 1, respectively, the arithmetic mean is A. 5.5 B. 5.6 C. 5.7 D. 5.8 Ans: 5.7 59. The algebraic sum of the deviations of a set of numbers from their arithmetic mean is A. zero B. unity C. infinite D. ten Ans: Zero 60. The set of numbers 3, 4, 4, 5, 6, 8, 8, 8, and 10 has median A. 4 B. 5 C. 5.5 D. 6 Ans: 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 18 has median A. 9 B. 10 C. 10.5 D. 11 Ans: B. 10 62. The set 2, 2, 5, 7, 9, 9, 9, 10, 10, 11, 12, and 18 has mode A. 7 B. 9 C. 9.5 D. 10 Ans: B. 9 63. What is the mode of set 3, 5, 8, 10, 12, 15, and 16 A. 10 B. 12 C. 8 D. no mode Ans: D. no mode 64. 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 7 D. 4 and 7 E. none of the above Ans: 4 and 7 65. The geometric mean of the numbers 2, 4, and 8 is A. 2 B. 4 C. 6 D. 8 Ans: 3rt(2/4/ B 66. The harmonic mean of the numbers 2, 4, and 8 A. 2.43 B. 3.43 C. 4.43 D. 4.43 Ans: 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. 6.43 C. 7 D. 7.7 Ans: B. 6.4283 68. Find the arithmetic mean of the numbers 3, 5, 6, 6, 7, 10, and 12. A. 6 B. 6.43 C. 7 D. 7.7 Ans: C. 7 69. Find the mean deviation of the set 2, 3, 6, 8, 11 A. 4 B. 5 C. 6 D. 7 70. Find the harmonic mean H of the numbers 3, 5, 6, 6, 7, 10, and 12 A. 5.85 B. 5.86 C. 5.87 D. 5.88 E. 5.89 Ans: C. 5.87 71. The second moment about the mean is A. mean deviation B. geometric mean C. variance D. standard deviation Ans: Variance 72. For unimodal frequency curves, which are symmetrical, the empirical relation between mean, median and mode is A. mean — mode = 3(mean — median) B. mean + median = mode C. mode mean = 3median D. mean — mode = mean Ans: Option A 73. Given the following number, evaluate the average mean of the distribution. 51, 50, 47, 50, 48, 41, 59, 68, 45, 37 A. 49.6 B. 49.8 C. 49.9 D. 50.1 Ans: A. 49.6 74. A student receives marks of 85, 76, 93, 82 and 96 in five subjects. Obtain the median mark A. 96 B. *85 C. 76 D. it does not exist Ans: B. 85 75. The variance of the numbers 4, 7, 5, 9, 8, 3, 6 is A. 9 B. 6 C. 7 D. 4 Ans: D. 4 76. Which of the following is not true? A. A continuous variable assumes any value within an interval B. A discrete variable is a variable that assumes only counting set of values. C. Two sources of statistical data are quantitative and qualitative data D. Data are raw materials of research Ans: Option C 77. The variance of the set of numbers 3, 5, 2, 6, 5, 9, 5, 2, 8, 6 is A. 5.1 B. 51 C. 5.43 D. 9 78. The harmonic mean of the numbers 3, 5, 6, 6, 7, 10, 12 is A. 58.7 B. 87 C. 587 D. *5.87 Ans: D. Obviously 79. One of the differences between a population and a sample is that A. a population is a subset of the units of a sample B. a sample is a subset of the units of a population C. a sample is a set of units D. a population is a set of units Ans: Option B 80. One of the following graphical methods does not require at least an axis to plot A. Bar graph B. Stem and leaf C. Histogram D. Dot spot Ans: 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 questionaire to assess the type ofA. Diet B. Toxins C. Vitamins D. All of the above 82. The geometric mean of the numbers 2, 6, 9, 12 A. 18 B. 6 C. 5.67 D. 2.25 83. What is Statistics? A. The collection, presentation, analysis, and utilization of numerical data to make inferences and reach decisions in the face of uncertainty in economics, business, and other social and physical Sciences B. The body of procedures and techniques used to collect, present, and analyze data on which to base decisions in the face of uncertainty or incomplete information C. A branch of Mathematics that deals with the analysis and interpretation of numerical data in terms of samples and populations D. All of the above 84. The greater the number of intervals the more _____ is retrieved. Supply the missing word in the above sentence. A. Information B. Class width C. Class size D. Frequency 85. The second moment about zero for the set of numbers 4, 7, 5, 9, 8, 3, 6 is A. 40 B. 28.50 C. 40.00 D. 20.16 86. A set of numbers consists of six 6’s, seven 7’s, eight 8’s, nine 9’s and ten 10’s. What is the arithmetic mean of the numbers? A. 6.77 B. 7.67 C. 8.25 B. 9.25 87. The second moment about the mean for the set of numbers 2, 5, 8, 11, 14, 17 is A. 26.25 B. 0 C. 11.9 D. 31.5 88. 7 pupils of average age 12years leave a class of 25 pupils of average age 14years. if 6 new pupils of average age 11 years join the class, what is the average age of pupils now in the class? A. 13years 10months B. 12years C. 12years 10months D. 13years dunno, I got 13years 7 months 89. In correlation analysis, a correlation coefficient (r = 1) is an indication of which type of relationship? A. Zero correlation B. Curve C. Nonlinear correlation D. *Positive perfect correlation 90. Which of the following is not a method of data gathering A. Experimentation B. Paper and pencil C. Interview D. Observation 91. 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 is A. 79.95 B. 75.5 C. 77.10 D. 64.995 92. Types of Price index include the following except A. Gross Domestic Product Deflator B. Consumer Price Index C. Producer Price Index D. Demand Price Index 93. The degree of asymmetry or departure from symmetry of a distribution is referred to as A. kurtosis B. skewness C. standard error D. mean deviation 94. Representation of data in which every observed value is paired with its relative frequency is called A. frequency distribution table B. cummulative frequency distribution table C. relative frequency distribution table D. cummulative distribution table 95. Which of the following statements is not correct? A. A frequency polygon is a line graph of class mark obtained by connecting the class frequencies B. A line graph is needed for a frequency polygon C. A frequency polygon is a line graph of class frequencies obtained by connecting the midpoints of the tops of the rectangles forming a histogram D. A straight line is needed for a frequency polygon 96. 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 the centre of the circle, what is Z? A. 15 B. 54 C. 50 D. 27 97. 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 skewness A. 145 B. 14.48 C. 0.14 D. 1.44 98. The largest of a set of 50 measurements is 8.34kg. If the range is 0.46kg, find the smallest measurement. A. 78kg B. 7.88kg C. 8.5kg D. 82kg 99. The second moment about the mean of the set of numbers 2, 3, 7, 8, 10 is A. 92.10 B. 9.25 C. 11.50 D. 19.21 100. Find the sum of the range and the mode of the set 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.14 C. 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 be used to describe only A. Qualitative data B. Secondary data C. Quantitative data D. Primary data 102. A student received the following grades on the 10 quizzes he took during a semester 6, 7, 6, 8, 5, 7, 6, 9, 10 and 6. Which of these statements is true of median from this distribution? A. 5.5 B. 5.5th item C. 6 or 7 D. 6.5th item 103. Given that for a distribution of wages data mean = $79.76, median = $79.06, mode = $77.50, standard deviation = $15.60. Find the Pearson’s second coefficient of skewness A. 0.14 B. 145 C. 1.44 D. 14.48 104. A tabular arrangement of data by classes together with the corresponding class frequencies is called A. Frequency table B. Frequency distribution C. All of the above D. None of the above 105. The mean of four numbers is 5 and the mean deviation is 3. Find the fourth number if the mean deviation of the first three number is 2 A. 11 B. 6 C. 10 D. 27 106. The second moment about 1 for the set of numbers 2, 3, 7, 8, 10 is A. 45.21 B. 36.6 C. 4.52 D. 34.20 107. A population is defined statically as a set of A. Things B. Units items C. Animals D. Human being 108. Raw data are collected data which have ______ numerically A. been graphed B. not been organized C. been organized D. been presented 109. The advantages of secondary data include the following except A. 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 classifies each 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 as A. Qualitative B. Numerical C. Quantitative D. Primary 111. The mean of twelve positive numbers is 3. When another number is added, the mean becomes 5. Find the thirteenth number A. 29 B. 28 C. 27 D. 26 E. 25 Should be 24 na 112. Calculate the harmonic mean of the following numbers. 100, 47, 96, 80, 3, 1, 10, 2 A. 1.0984 B. 2.0987 C. 3.3456 D. 4.0251 113. The series of 16 students in STA117 for 2009/2010 academic session are: 65, 65, 55, 60, 60, 65, 60, 70, 75, 70, 65, 70, 60, 65, 65, 70. What is the sum of the median and modal scores A. 130 B. 140 C. 150 D. 160 114. One of the following is a class or major class of data A. Quantitative data B. ObservationC. Interval D. Experimental data 115. The second moment about origin for the set of numbers 3, 2, 4, 1, 5 is A. 55 B. 11 C. 4 D. 18 116. A student receives marks of 85, 76, 93, 82 and 96 in five subjects. Obtain the modal mark A. 76 C. 432 C. it does not exist D. 86.4 117. Find the harmonic mean and the geometric mean of 2, 4 and 8 A. 4 and 3.43 B. 34.3 and 3 C. 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 is A. 77.50 B. 79.68 C. 74.995 D. 65.78 119. Evaluate the median of the set of data below 18, 10, 15, 13, 17, 15, 12, 15, 18, 16, 11 A. 13 B.14 C. 15 D. 16 120. Data collected through telephone enquiry, survey and interview are known as A. primary data B. qualitative data C. secondary data D. quantitative data 121. Experimental data is always a A. Qualitative data B. Primary data C. Quantitative data D. Secondary data 122. Suppose that we have data on the incomes of 1000 Nigerian families. This body of data can be summarized by finding the average family income and the spread of these family incomes above and below the average. The data also can be described by constructing a table, chart, or graph of the number or proportion of families in each income class. What aspect of statistics is this? A. Inferential statistics B. Elementary statistics C. Introductory statistics D. Descriptive statistics 123. Which of the following is true for a unimodal frequency curve? A. mean — mode = 3(mean — median) B. mean + median = mode C. mode mean = 3median D. mean — mode = mean 124. Find the geometric mean of 5, 10, 15. A. 9.09 B. 9.20 C. 2.97 D. 2.90 125. Marks scored by some student in arithmetic test are 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 is A. 6 B. 5 C. 8 D. 9 126. Both circles and rectangles can be used to plot a histogram A. True B. False no na.. 127. The harmonic mean of the numbers 3, 2, 5, 6 is A. 2.90 B. 3.33 C. 6.9 D. 3.8 128. A random sample of seven observations was taken from a population of 100 observations. The results were as follows: 14, 19, 15, 18, 10, 13 and 16. Calculate the standard deviation of the observations A. 3.06 B. 3.90 C. 2.83 D. 2.54 129. The unknown intercept parameter in a linear regression model determines A. the value of the dependent variable when the effect of the independent variable is zero B. the value of the independent variable when the effect of the dependent variable is zero. C. the relationship between the dependent variable and the error term. D. the relationship between the independent variable and the error term 130. Which of the following statements is not true? A. The width of the bar rectangle could be of any convenient size B. All the bars must have the same width and they should overlap C. A bar chart is a series of rectangles whose heights are drawn proportionally to the values that are being represented or assessed D. The heights of the bars should be drawn to scale to show the relative measurements 131. The use of published data as reference for your survey work is an example A. Tertiary data B. Primary data C. Secondary data D. Universal data 132. The difference between a census and a survey is that A. Census require enumerating every unit of the population B. Survey is used when an information is required about a population C. Census require identifying the population of interest D. Survey required trained personnel 133. Find the second moment of the set 2, 3, 7, 8, 10. A. 6.9 B. 10.3 C. 45.2 D. 3.4 134. Given the regression line of y = 6 + 5x. obtain the estimate of y if x = 2 A. 16 B. 17 C. 18 D. 19 135. The standard deviation of the numbers 3, 6, 2, 1, 7, 5 is A. 12 B. 2.16 C. 3.87 D. 5 136. The Pearson’s first coefficient of skewness is given by A. skewness = mean − mode standard deviation B. skewness = 3(mean − mode) standard deviation C. skewness = mean − median standard deviation D. skewness = 3( mean − median) standard deviation 137. The Pearson’s second coefficient of skewness is given by A. skewness = mean − mode standard deviation B. skewness = 3(mean − mode) standard deviation C. skewness = mean − median standard deviation D. skewness = 3( mean − median) standard deviation 138. The third moment about the mean for the set of numbers 5, 7, 4, 6, 3, 8, 9 is A. 0.4 B. 0 C. 25 D. 4 139. All of the following are branches of statistics except one which is a sub branch A. Biostatistics B. Biometrics C. Economitrics D. Quality control 140. Suppose that we have data on the incomes of 1000 Nigerian families. If these 1000 families are representative of all Nigerian families, we can then estimate and test hypotheses about the average family income in Nigerian as a whole. Since this conclusion are subject to error, we also would have to indicate the probability of error. What aspect of statistics is this? A. Elementary statistics B. 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 records are called A. qualitative data B. primary data C. quantitative data. D. secondary data 142. A random sample of seven observations was taken from a population of 100 observations. The results were as follows: 14, 19, 15, 18, 10, 13, and 16. Calculate the variance of the observations A. 7 B. 8 C. 9 D. 10 143. Which of the following measures can we use to obtain the strength of the relationship between two or more variables when our data are on interval scale? A. coefficient of determination B. Regression C. Spearman’s coefficient of rank correlation D. Pearson’s product moment correlation coefficient. 144. If 5, 8, 6 and 2 occur with frequencies 3, 2, 4 and 1 respectively, Find the product of the modal and the median numbers A. 42 B. 37 C. 44 D. 47 145. The range of the set of numbers 2, 3, 3, 5, 5, 5, 8, 10, 12 is A. 53 B. 1 C. 10 D. 100 146. In statistical analysis of data involving two or more variables, the degree of relationship between the variables can be measured by A. coefficient of variation B. regression equation C. correlation coefficient D. absolute measure of spread 147. Statistical data obtained from hospital records are calledA. quantitative data. B. qualitative data C. secondary data D. primary data 148. In a class of 150 students, the sector in a pie chart representing the students offering STA117 has angle 12 degree. How many students are offering STA117? A. 4 B. 5 C. 5.5 D. 6.5 149. The first moment about the origin 4 for the set of numbers 2, 3, 7, 8, 10 is A. 12 B. 3 C. 2 D. 13 150. The mean of the numbers 1.2, 1.0, 0.9, 1.4, 0.8, 0.8, 1.2 and 1.1 is A. 1.05 B. 1.02 C. 1.0 D. 0.8 151. The difference between a nominal and a ratio scale of measurement is that a ratio scale of measurement has A. unit of measurement B. decimal point C. whole number D. origin 152. The first moment about the origin for the set of numbers 2, 3, 7, 8, 10 is A. 6 B. 3 C. 4 D. 5 153. Observations that cannot be measured on a natural numerical scale but can be classified into groups of categories are known as? A. Raw data B. Data C. Quantitative Data D. Qualitative Data 154. Which of these is not a characteristic of a histogram? A. The areas of the rectangles are proportional to the class mark B. All the rectangles have their centers on the class mark C. All the rectangles having their bases on the horizontal axis D. The areas of the rectangles are proportional to the class frequencies 155. The mean of the set of numbers 12, 6, 7, 3, 15, 10, 18, 5 is A. 4.87 B. 48.7 C. 9.50 D. 23.716 156. Quartile is a measure of A. Scale B. Partition C. Dispersion D. Central tendency 157. Which of the following measures can we use to obtain the strength of the relationship between two or more variables when our data are on interval scale? A. Spearman’s coefficient of rank correlation B. Regression C. coefficient of determination D. Pearson’s product moment correlation coefficient 158. The Geometric mean of the numbers 3, 5, 6, 6 is A. 6.43 B. 4.82 C. 5.41 D. 0.643 159. A students final marks in MAT111, PHY113, GST110 and STA117 are respectively 82, 86, 90 and 70. If the respective credits received for these course are 3, 5, 3 and 1. Determine an approximate mean mark A. 84.3 B. 85.4 B. 84.7 D. 84 160. In studying a population the characteristics of interest is referred to as A. 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 collection except A. interview B. observation C. Graph D. questionnaire 162. The third moment about the origin 4 for the set of numbers 3, 2, 4, 1, 5 is A. 3 B. 4.3 C. 7 D. 7 163. Which of these is not true? A. Skewness is the degree of asymmetry of a distribution. B. For skewed distributions, the mean tends to lie on the same side of the mode as the longer tail. C. Kurtosis is the degree of peakedness of a distribution. D. If the frequency curve of a distribution has a longer tail to the right, then the distribution negatively skewed. 164. Find the mean deviation of the set of numbers 4, 5, 9. A. 6 B. 5 C. 2 D. 0 165. Find the geometric mean of the following set of data. 3, 3, 1, 9 A. 1 B. 2 C. 3 D. 4 166. What is the mean deviation of 3, 5, 8, 11, 12 and 21? A. 4.7 B. 60 C. 3.7 D. 10 167. When the population of interest is partitioned into sets of homogenous subpopulation, the method of sampling techniques used is called A. Simple random sampling B. Cluster sampling C. Stratified random sampling D. Double sampling 168. Out of 100 numbers, 20 were 4's, 40 were 5's, 30 were 6's, and the remainder were 7's. Find the arithmetic mean of the numbers. A. 5.3 B. 53.3 C. 0.53 D. 533 169. 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. 67 C. 6.7 D. 6.8 170. The third moment about the mean for the set of numbers 5, 7, 4 ,6, 3, 8, 9 is A. 0 B. 1 C. 2 D. 3 E. 4 171. The degree of peakedness of a distribution is referred to as A. moment B. histogram C. skewness D. kurtosis 172. If Musa scored 75 in STA117 instead of 57, his average mark in four courses would have been 60. What was is total A. 222 B. 223 C. 224 D. 225 173. If the mean of numbers 0, x+2, 3x+6 and 4x+8 is 4, find their mean deviation A. 2 B. 0 C. 3 D. 4 174. Observations that cannot be measured on a natural numerical scale but can be classified into groups of categories are known as? A. Qualitative data B. Quantitative data C. Data D. Raw data 175. The difference between a population and a sample is that A. Sample is a subset of a population B. Sample is less tedious and unexpensive as population C. Sample can be studied in a survey D. Population required trained personnel for enumeration 176. The sectorial allocations to various ministries in a state budget are as follows agriculture #25,000,000.00, education#20,000,000.00 women affairs#35,000,000.00 commerce and industries#20,000,000.00. In a pie chart to represent this information, the corresponding angle to agriculture is A. 45 B. 60 C. 90 D. 180 177. A skewed distribution has the following characteristics except A. It has mean, mode and median at the same spot in the distribution B. It has skew coefficient not equals to zero C. It can be analyses using an appropriate non parametric test D. It does not meet the normalities assumption 178. The range of the set of numbers 2, 3, 3, 5, 5, 5, 8, 10, 12 is A. 100 B. 10 C. 1 D. 53 179. 4, 16, 30, 20, 10, 14 and 26 are represented on a pie chart. Find the sum of the angles of the sectors representing all numbers equal to or greater than 1 A. 276 B. 360 C. 48 D. 299 180. The geometric mean of the set 1, 2, 3, 4 and 0 is A. 2.21 B. 1.89 C. 3.14 D. 0 181. Quantitative data is divided in to A. large and small B. grouped and ungrouped C. interval and ratio D. nominal and ordinal 182. Qualitative data is divided in to A. large and small B. grouped and ungrouped C. interval and ratio D. nominal and ordinal183. The measurement of temperature is grouped under A. interval B. ratio C. nominal D. ordinal 184. The army ranks can be classified as A. interval B. ratio C. nominal D. ordinal 185. The death rate is a ______ data. A. interval B. ratio C. nominal D. ordinal 186. The rate of accident is classified as A. interval B. ratio C. nominal D. ordinal 187. The I phone series is a good example of _____ data. A. interval B. ratio C. nominal D. ordinal 188. Types of fish is an example of A. interval B. ratio C. nominal D. ordinal 189. The candidates JAMB score is a _____ data. A. interval B. ratio C. nominal D. ordinal 190. A _____ is the set of all units or objects in a defined area of interest. A. survey B. population C. census D. sample 191. A portion of population is called A. survey B. population C. census D. sample 192. One these is not an advantage of Sampling A. time saving B. cost minimization C. precision D. bulky 193. Which of the following is not a source of data? A. direct observation B sample survey C. designed experiment D. none of the above 194. A method of data collection where an analyst goes to the field an investigate is known as A. direct observation B sample survey C. designed experiment D. published source 195. Data collected from a published source is also known as _____. A. primary data B. secondary data. C. qualitative data D. quantitative data 196. The difference between the minimum and maximum value of a data is known as the A. mean B. median C. mode D. range 197. A _____ contains the basic details of all members of the population from which sample are to be drawn A. sampling data B. sample frame C. sampling design D. sampling method 198. _____ is not an example of sampling design A. Simple random B. Stratified C. Multi stage D. Variable 199. ____ sampling allows every member to have equal chance of picking A. Simple random B. Stratified C. Multi stage D. Systematic 200. In systematic sampling if x = 9 and k = 5, the next three members are A. 5, 14, 23 B. 9, 14, 19 C. 14, 19, 24 D. 14, 23, 32 Use the information below to answer the next three (3) questions. A sample size of 50 is to be selected from a population of 1000 using systematic sampling 201. What is the range of the first member? A. 0  20 B. 0 19 C. 1 – 19 D. 1 – 20 202. What is the value of the common difference k? A. 10 B. 19 C. 20 D. 21 203. What is the first three members if the first member is 17 A. 17, 37, 57 B. 17, 34, 51 C. 17, 36, 56 D. 37, 57, 77 Use the information below to answer the next three (3) questions. In a population of 3000, a sample size of 70 is to be selected using systematic sampling 204. Which of the following can be picked as the first member? A. 42 B. 43 C. 69 D. 70 205. What is the range of the first member? A. 0 – 42 B. 1 – 42 C. 0 – 43 D. 1 – 43 206. If the first member is 23, what is the next three numbers A. 23, 93, 163 B. 92, 162, 232 C. 93, 163, 233 D. 23, 93, 1631 2 3 A 2,000 1,200 800 B 25,000 20,000 15,000 Use the table above to answer the next 10 questions. Using stratified method of sampling, the members in a population (i.e. A and B) were grouped in to three (3) strata. The sample size for A and B are 60 and 120 respectively. 207. What is the population size of group A? A. 2000 B. 3200 C. 4000 D. 5000 208. How many samples will be taken from stratum 1 in group A A. 6 B. 12 C. 18 D. 30 209. How many samples will be taken from stratum 3 in group A A. 6 B. 12 C. 18 D. 30 210. What is the population size of group B? A. 40,000 B. 50,000 C. 55,000 D. 60,000 211. How many samples will be taken from stratum 2 in group B A. 30 B. 40 C. 50 D. 60 212. How many samples will be taken from stratum 3 in group B A. 30 B. 40 C. 50 D. 60 213. A sampling method that involves dividing into stages is called _____ sampling. A. Simple random B. Stratified C. 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 Boy B. The Girl C. Impossible to tell D. None of the above 
Re: Statistic 117 Questions And Answers (no Solving Tho) by Nostradamus1: 8:43am On Jan 10 
Obinoscopy:C 1 Like 
Re: Statistic 117 Questions And Answers (no Solving Tho) by Obinoscopy(m): 7:07am On Jan 11 
Nostradamus1:Correct 
Re: Statistic 117 Questions And Answers (no Solving Tho) by ABCthingx: 4:16pm On Jan 11 
Obinoscopy:It'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:Thanks 
Re: Statistic 117 Questions And Answers (no Solving Tho) by Obinoscopy(m): 4:47pm On Jan 11 
ABCthingx:That'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:This should be combination i think so 5C3 which gives 10 Manual method checks 1 Like 
Re: Statistic 117 Questions And Answers (no Solving Tho) by Obinoscopy(m): 6:04am On Jan 12 
Nostradamus1: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. 
Re: Statistic 117 Questions And Answers (no Solving Tho) by Nostradamus1: 10:50am On Jan 12 
Obinoscopy: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: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: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: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. 
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