Weren't you meant to find the mean by adding the two values and dividing by 2. The use one of the bounds eg lower to work out the sample variance by using xbar -t9(0.025) x s/root(n)
And rearrange to get S Then square S and use the (n-1)S^2 / Chi squared values?
D1 last week I did it then checked, realized I did a question completely wrong, and decided it wasn't worth the mental energy and stress to change because 1 modules don't count to A*
Same, I also learnt most of it yesterday and I found it pretty easy :0
Question 1: Significant (designer) Question 2: Not significant for both mean and standard deviation (pigs) Question 3: 0.3828 for the Type II Error Question 4: Test A was better Question 5: Not significant for both F-test variance and two sample t-test (fire brigade) Question 6: End up with n>1 S is better than Y Question 7: 76.1, 1034 (I should be right, it asked for the confidence interval for variance instead of mean)
I also finished learning it yesterday, also found it quite easy and agree with all the answers I can remember.
I don't think it was 0.404, that's way too big for a type 1 error, and SB007, do you mean 15 for part c? I used p=0.25 and did P(X>=6) (I think Can't quite remember)
I don't think it was 0.404, that's way too big for a type 1 error, and SB007, do you mean 15 for part c? I used p=0.25 and did P(X>=6) (I think Can't quite remember)
My mistake, I meant 0.0404 :P
I thought part C was P(6 <= X <= 14 | p=0.25)? Dunno