Multiple Choices:

1.

A chemistry course is taught by three different instructors. The chairperson of the chemistry department wants to know if the distribution of letter grades (A, B, C, D, F) differs between instructors. If conditions are met, what kind of hypothesis test would be appropriate?

A. Z-test for single proportion

B. Z-test for difference in proportions

C. Chi-square test for independence

D. Chi-square goodness of fit

2.

Researchers recruited 200 patients with primary anxiety disorder and randomly assigned them to either participate in a low intensity exercise program or a high intensity exercise program. At the end of the program, 54 out of 100 people in the low intensity exercise program had reduced anxiety symptoms; 72 out of 100 people in the high intensity exercise program had reduced anxiety symptoms.

Test the hypotheses

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