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OCR MEI Statistics Minor 14th June 2024

How did it go? I thought it went ok but definitely a hard paper
(edited 1 month ago)

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Original post by boppiness456
How did it go? I thought it went ok but definitely a hard paper
I really liked it, thought it was tricky but for some reason I was on form and could answer all of them except some of the word answer ones
Reply 2
How did everyone calculate the variances for Q5?
Original post by A_s1244
How did everyone calculate the variances for Q5?


Is this the cd question?
First question was so sneaky lol
Someone make a thread for the major please
Original post by firsthand-tamale
I really liked it, thought it was tricky but for some reason I was on form and could answer all of them except some of the word answer ones


I personally found worded questions pretty alright most were repetitive of previous as and alevel papers. Uniform distribution one 3 marker threw me off
Reply 7
Original post by Jking_Studying
Is this the cd question?

Yeah, and which critic did u choose
It was certainly an unusual paper, any idea if I’ll get penalized for giving more than one/two conditions for distributions to be used if all were correct but question asked just for one/two
Original post by A_s1244
Yeah, and which critic did u choose


Bro I didn’t do that correct how do u do it? I said critic 2 though just guessed lol
Original post by Jking_Studying
Is this the cd question?

I said the 1 or A was wrong because it had more variation so it was Var(2X) instead of Var (xm+xa)
Original post by JustBenjamin
It was certainly an unusual paper, any idea if I’ll get penalized for giving more than one/two conditions for distributions to be used if all were correct but question asked just for one/two


I hope not I did the same lol
Original post by JustBenjamin
I said the 1 or A was wrong because it had more variation so it was Var(2X) instead of Var (xm+xa)


I knew it had to do with something like this only problem i didn’t know how to find the variance
What did people get for their pmcc value?
Original post by Jking_Studying
I knew it had to do with something like this only problem i didn’t know how to find the variance

I think it was the way you’d do in normal maths but it was not sample but population so 1/n (sum(x^2)-sum(x)^2/n
Also for the tests which one did you’ll do reject or not reject ??
Original post by Jking_Studying
What did people get for their pmcc value?

Around 0.799
Reply 17
For the variance in the cd q did people use the formula in the formula book for s^2 that we use in regular maths? Or something else
Original post by A_s1244
For the variance in the cd q did people use the formula in the formula book for s^2 that we use in regular maths? Or something else


Isn’t that standard devotion?
Original post by A_s1244
For the variance in the cd q did people use the formula in the formula book for s^2 that we use in regular maths? Or something else

I used it but I used 1/n not 1/n-1 as it was like data for all the stuff on the CD so I woudlnt call it a sample but they may have wanted 1/n-1 not sur e

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