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Tetralogyfallot's Posts

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EducationRe: Nigerian Man From Kano Graduates As Best Student From Russian Medical School Pix by tetralogyfallot(m): 8:47am On Jun 28, 2017
Let's celebrate this bookworm by sending this topic to frontpage
Cc
Lalasticlala
Ishilove
Semid4lyfe
Obinoscopy
Technology MarketRe: Buy Plasma, Lcd And Led Televisions For Affordable Pricein Lagos. by tetralogyfallot(m): 1:53pm On Jun 07, 2017
acunon:
Hi

42" LG LED is 100k


47" LG LED is 120k


49"/50" LG LED is 150k
is the LG 42" Smart?
EducationRe: What Every Nigerian Medical Student Must Experience In Medical School. by tetralogyfallot(m): 1:02pm On Jan 27, 2017
I started consulting since 200level despite me not knowing a damn thing about medicine then I do a lot of research cos I don't want to look like a quack. Thanks to webmd, medscape, itriage n senior colleagues cos they are my saviour. The funniest thing I encountered was when an old man old enough to b my father showed me his swollen balls and rashes around his groin for treatment.
FashionRe: Photos: Am The Most Handsome And Decent Nairalander, Your Take by tetralogyfallot(m): 10:54am On Oct 17, 2016
you got self confidence to upload your pix online. its commendable
CrimeRe: Finally We Caught The Lady Goat Thief In My Neighborhood (pix) by tetralogyfallot(m): 7:01pm On Sep 23, 2016
Everyday is for the thief and one day is for the owner
CelebritiesRe: Omotola Jalade Baffled As Mark Zuckerberg Meets With Everyone Excluding Her by tetralogyfallot(m): 8:20am On Sep 04, 2016
because you have so many fan base. Go sit down abeg
EducationRe: What Is The Fate Of Those That Have Not Been Posted By Jamb by tetralogyfallot(m): 9:19am On Jul 12, 2016
I think they are still uploading it.
PhonesRe: Guy Flaunts His New Nokia 3310 Phone by tetralogyfallot(m): 9:59am On Jul 01, 2016
Forward ever backward never Insha'Allah.
CelebritiesRe: Photo Of Mide Martins And Femi Adebayo That Got Fans Talking by tetralogyfallot(m): 11:01am On Jun 28, 2016
Sbsbsb
TravelRe: Boat Conveying 28 Passengers Capsizes In Lagos by tetralogyfallot(m): 8:56pm On May 25, 2016
Rip to the dead
AutosRe: 2006 Honda Accord DC For Sale In Abuja. Sold! Sold!! Sold!!! by tetralogyfallot(m): 8:16pm On May 25, 2016
What's the price
Technology MarketA Clean White 32gb Iphone 4s For Sale by tetralogyfallot(op): 3:47pm On Feb 21, 2016
i have a clean fairly used iphone 4s 32gb for sale. i'll upload the pix later
Jobs/VacanciesRe: Nigeria Immigration Service 2015 Recruitment Invitation For Aptitude Test by tetralogyfallot(m): 8:31am On Nov 12, 2015
destiro:
The only people i think can salvage our situation is the house of reps/senate, bicos dat abeshi of a man is hell bent on ignoring us.
and he too will b disperse very soon
Technology MarketRe: **PHONE SWAP CENTRE**SWAP IT NOW!!! pin:265DA560 or 08033923897 by tetralogyfallot(m): 5:06pm On Nov 10, 2015
bobo65:
So we are to buy a ram, 32gb mem card, battery and os for 23k?

Oga what are u selling biko
abeg help me ask am o
PoliticsRe: Nigerians Disenchanted As New President ‘too Slow’ - THE WASHINGTON TIMES by tetralogyfallot(m): 1:02pm On Nov 09, 2015
Slowness dey worry the man too much.
PhonesRe: Did Anyone Get This Text From Mtn? by tetralogyfallot(m): 11:28am On Nov 09, 2015
Not for all sim cards.
SportsRe: Nigeria Wins U17 World Cup For Record 5th Time by tetralogyfallot(m): 8:32am On Nov 09, 2015
Nigerian youths making Nigeria proud since 200bc.
PoliticsRe: 8 Main People President Buhari Can Not Do Without - Vivian Gist by tetralogyfallot(m): 11:37am On Nov 08, 2015
Where's lai mohammed n tinubu
EducationRe: Obasanjo’s Bells University Graduates 21 Students With 1st Class Degrees by tetralogyfallot(m): 6:39pm On Nov 07, 2015
The way people graduate with first class these days is alarming. The thing Don dey even loose value sef
Technology MarketRe: **PHONE SWAP CENTRE**SWAP IT NOW!!! pin:265DA560 or 08033923897 by tetralogyfallot(m): 3:44pm On Nov 07, 2015
Got a clean Xperia z3 to swap with iPhone 6.
PoliticsRe: Taraba State Governorship Election Tribunal To Deliver Judgement Today.. by tetralogyfallot(m): 10:33am On Nov 07, 2015
Mama Taraba here we go
EducationRe: Nairaland Mathematics Clinic by tetralogyfallot(m): 12:43am On Oct 22, 2015
Karmanaut:
You're in luck.
There's light now.
Thanx bro! Really appreciate
EducationRe: Nairaland Mathematics Clinic by tetralogyfallot(m): 11:37pm On Oct 21, 2015
Karmanaut:
Do you understand?
I don't get it bro, i will prefer you to upload it. Thanx in anticipation.
EducationRe: Nairaland Mathematics Clinic by tetralogyfallot(m): 11:09pm On Oct 21, 2015
Karmanaut:
tetralogyfallot:

How to solve:
Create a table for finding the mean:
One column for Amount, another for frequency, and another for the cumulative frequency.
In the places where there are unknowns write the cumulative frequency in terms of unknowns, ie in algebraic form.
For example The second cumulative frequency will be 18 + x., the Third 43 + x.
Then since we have the value of the median and the total frequency we can find an unknown which will enable us find the other unknown.
Use the formula for finding the median of a grouped data.
Estimated Median = L + {w * [ (n/2) − cfb] }/ fm
Where
L is the lower class boundary of the group containing the median
n is the total number of data
cfb is the cumulative frequency of the groups before the median group
fm is the frequency of the median group
w is the group width.

After setting up the table you'll see that the median class is 41-60, because it's cumulative frequency contains half of the total frequency.


So our L will be 41,
N = 87, from the question
cfb will be 18+x as it is the cumulative frequency of the class before the median class.
fm, the frequency of the median class is 25.
And we were given the median to be 48.
The class width is obviously 20.


So you substitute your values in and solve for x.
To find y:
Since the total frequency is 87, when you've gotten x, summing the frequencies should give you 87.
So you have 18 + x + 25 + y +15 = 87.
When you get x substitute it then get y.

I hope you can take it from here?

If you solve it correctly you should get:
x=16.75; y = 12.25.

Would have written the solution and uploaded it but Almighty PHCN has struck and I'm too lazy to turn on the generator.
If you don't understand then maybe I'll write it and upload when there's power.

PS: Two people uploaded the same question, are you two the same person or is this an assignment?
Cheers.
Thanx bro, its an assignment and the other username is my friend.
EducationRe: Nairaland Mathematics Clinic by tetralogyfallot(m): 8:56pm On Oct 21, 2015
Gurus, help me solve this question please.

Jobs/VacanciesRe: #60,000 Salary Job Or Masters Degree? Please Advise Me by tetralogyfallot(m): 9:47am On Sep 28, 2015
h
PoliticsRe: Buhari Prevented From Meeting Pope Francis After Late Arrival by tetralogyfallot(m): 7:50pm On Sep 27, 2015
wailing wailers @ it again. una no dey tire?
TV/MoviesRe: "Eviction Day": Nkem Owoh Grabs New Wedded 'Wife' From The Back On Set (Pics) by tetralogyfallot(m): 7:39pm On Sep 27, 2015
and then?
Jobs/VacanciesRe: Nigeria Immigration Service 2015 Recruitment Invitation For Aptitude Test by tetralogyfallot(m): 9:37pm On Jun 24, 2015
Raywise:
Locked brains! Nigerian idiots who ain't ashamed to marry long legs with merit iro getting jobs. Too disappointing. Ain't graduates supposed to reject any shortlistment on d basis of manipulations? What i see here is disgusting. I am bouncing on dos who don't ve brains as revealed by their threads. If u re the one...ur repartee.
shoro niyen
Foreign AffairsRe: South Africans Attack Nigerians -VANGUARD by tetralogyfallot(m): 8:34am On Apr 23, 2015
south africa na messed up country. no matter what they can never b like nigeria. useless country
Jobs/VacanciesRe: My Challenges On The Current Immigration Recruitment Need Ur Advise by tetralogyfallot(m): 10:48pm On Apr 14, 2015
Iphee07:
I have a challenge oo,got the med certificate but the doctor wey I no send work go put height as 1.61 but I'm 1.71. I put my real height on my page. I'm worried cos the required height is 1.64 nd can't correct it cos I don't know the doctor personally. Wat do you advise, pals?
dont get worried cos they will recheck it when they call for physical training. what is in paper is your own they will check their own during medicals screening

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