A survey asked people "On what percent of days do you get more than 30 minutes of vigorous exercise?" Using their responses we want to estimate the difference in exercise frequency between men and women. We should use a
A) 2-proportion z-interval
B) 1-proportion z-interval
C) 1-sample t-interval
D) 2-sample t-interval
E) matched pairs t-interval

Question

Quizplus · Accepted Answer

We want to compare the exercise frequency between two groups (men and women), so we need to use a 2-sample interval. We don't know the population standard deviation, so we should use a t-interval. Therefore, the best choice is a 2-sample t-interval (Option D).

A Survey Asked People "On What Percent of Days Do