A researcher wants to know if a new type of exercise improves peoples' health. Would this be a one-tailed or two-tailed test and why?
A)One-tailed because the study is only interested in whether the exercise increases health
B)One-tailed because the study only looks at the effects of exercise and does not take other factors into account
C)Two-tailed because they will have to study healthy and unhealthy people
D)Two-tailed because there is no predicted direction of difference

Question

Quizplus · Accepted Answer

The study is specifically interested in whether the new type of exercise improves health, indicating a specific direction of interest (increase/improvement in health), which is characteristic of a one-tailed test.

A Researcher Wants to Know If a New Type of Exercise