Two-tailed tests are more liberal and less powerful than one?tailed tests.

Name: Two-tailed tests are more liberal and less powerful than one?tailed tests.
Brand: Quizplus
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Question

Quizplus · Accepted Answer

Two-tailed tests are more conservative because they test for the possibility of an effect in two directions (both positive and negative) and thus require more extreme data to reject the null hypothesis, compared to one-tailed tests which only test in one direction.

Two-Tailed Tests Are More Liberal and Less Powerful Than One?tailed