If a distribution is approximately normal, the t-test is a more powerful test about the central
tendency of the distribution than the sign test.

Question

Quizplus · Accepted Answer

The t-test is more powerful than the sign test for data that are approximately normally distributed because it uses more information from the data, including both the magnitude and direction of differences, whereas the sign test only considers the direction of differences.

If a Distribution Is Approximately Normal, the T-Test Is a More