Using a two-tailed test makes it harder to get significance on any one tail. Thus, power is less with a two-tailed test than with a one-tailed test. (True or False)

Question

Quizplus · Accepted Answer

This statement is true. When using a two-tailed test, the alpha level is split between both tails, making it more difficult to achieve significance on either tail. Therefore, power is reduced compared to a one-tailed test where all the alpha level is allocated to one tail.

Using a Two-Tailed Test Makes It Harder to Get Significance