(Original post by Llewellyn)
I think the last question was trickier than last years because it gave you no help at all. It was just a paragraph, and they wanted the students to determine the distribution, set the hypotheses, state the range, figure out the continuity corrections, etc.
I agree it was a nice paper though, any idea for grade boundaries?
I'd guess 42 - 50 - 58 - 66 - 74 for C - B - A - A* - 100. Which is a bit higher than last years (because last year had that uniform question which everyone couldn't do apparently). Those boundaries are roughly the same as 2010, which I think would be a good approximation as it was of a similar difficulty.
My answers were, in order:
27, 39, 30, 153, 0.30854, 4.729, 0.8, 0.13, 0.01321, 0.94062, [0.9205, 0.9435], (ref. lifetime with 90%), 0.0996, (0.8 vs <0.8), 0.32997 (accept Ho), 0.02852 (reject Ho), (cosine rule), 8/pi, 0.460, 0.00193, 0.04182
2b) was worth a lot
of marks now that I look back