We Want to Assess Possible Side Effects of the Drug

Multiple Choice

We want to assess possible side effects of the drug nifedipine, which is used to reduce chest pain in patients with angina. A study measures the heart rate in beats per minute of patients with angina before and after being treated with nifedipine. To estimate the proportion of subjects whose heart rate increases after taking nifedipine, which procedure should we use?

A) A one-sample z procedure for a proportion
B) A two-sample z procedure for proportions
C) A one-sample or matched pairs z or t procedure for a mean
D) A two-sample z or t procedure for means