If you looked at stazi's answers for Q2, most of them seem to be wrongcimbom said:I guess they're not the same :| ... but I only read up to last year's Q2 anyway.
The last page of the quiz is easier than the second imo. 4a you do this thing where z= x- mu/sigma right, because you have the z and x values... (once you've worked them out) then you solve simultaneously to find the mean and standard deviation.
No offence, stazi. Also, I'm still stuck from Q4 onwards, my life is the sux