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

A_s1244

Original post by Jking_Studying

Is this the cd question?

Yeah, and which critic did u choose

Reply 8

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

Reply 9

Jking_Studying

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

Reply 10

JustBenjamin

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)

Reply 11

Jking_Studying

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

Reply 12

Jking_Studying

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

Reply 13

Jking_Studying

What did people get for their pmcc value?

Reply 14

JustBenjamin

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

Reply 15

Jking_Studying

Also for the tests which one did you’ll do reject or not reject ??

Reply 16

JustBenjamin

Original post by Jking_Studying

What did people get for their pmcc value?

Around 0.799

Reply 17

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

Reply 18

Jking_Studying

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?

Reply 19

JustBenjamin

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