T
TheArtfulDodger
Member
This is probably a really easy question but I've got stuck on the last section of question 8, part iii of the Sept 2006 ST3 paper.
The Examiners' Report says that "if working in £'s, mean of A is 17.16 & mean of B is 16.22 & mean of total is 17.55".
Can someone explain how these figures are calculated from the Normal mean and s.d that are calculated in this question for each of A, B, and the total?
The Examiners' Report says that "if working in £'s, mean of A is 17.16 & mean of B is 16.22 & mean of total is 17.55".
Can someone explain how these figures are calculated from the Normal mean and s.d that are calculated in this question for each of A, B, and the total?