Question

A physical therapist wants to determine the difference in the proportion of men and women who participate in regular sustained physical activity. what sample size should be obtained if sheshe wishes the estimate to be within fivefive percentage points with 9999​% ​confidence, assuming that

Answer 1

Using the sample size calculator, I get a sample size of 1514 people with a 99.99% confidence. So for a comparison between men and women, then 757 men and 757 women should be surveyed to enable to determine which group participates in regular sustained physical activity.