Question: Two polls (each based on a random sample of 1000) released just before the recent Ontario

provincial election seemed to suggest conflicting outcomes.

The breakdown in percentages for the two polls were:

(a) Test at the .05 level of significance whether the data constitute evidence of a real overall disagreement between the two polls.

(b) In particular, test whether the data constitute evidence of a real disagreement between the levels of support for the PC party between the two polls. Use the .05 level of significance.