Did you have to do continuity correction for the normal distribution question? I put in 55.5 and got a nice answer of 225, I then tried with just 55 and got not such a nice answer....
Ok, seems like I made a mistake in this big 8 marker... Did you do normal approximation from binomial to normal? With the normal approximations having n in it? I got a quadratic involving n in the end...! Slip or big error?
Should be around 72/75 for me. Make a stupid mistake on a and k question. Found the first simultaneous equation so I imagine there's a mark in that. IIRC correctly it was 4 marks so the other 3 will be dropped. Paper was quite a fair bit easier that I thought it would be. I predict high grade boundaries
yeah, it was easier because most past papers i did had a least more than one hypothesis testing and they had definitions but todays didn't. I hope GB arent too high!
Q2, N=60 0.0133 0.0159 Do not reject Ho (using binomial tables)
Q3, 0.75 151π/3
Q4, K=1/9
Q5, N=225
Q6, P(M=5)= 0.3 P(M=6)= 0.29 P(M=7)= 0.12
N=11
Q7,
Mean= 1.2 Var= 1.92 P(X>3)= 0.3250 £41.88 per bin
He shouldn't as the mean profit of bins would be £40
Qu 2d, because n isn't greater than 50 u don't approximate it and so i got 0.2252 (don't remember exactly) is greater than 0.5 and so accept H0 supports statement