The sign test is less powerful than the Wilcoxin signed ranks test.

Name: The sign test is less powerful than the Wilcoxin signed ranks test.
Brand: Quizplus
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Question

Quizplus · Accepted Answer

This is true. The sign test is a non-parametric test that only takes into account the direction of the difference between two related samples, while the Wilcoxin signed ranks test not only takes direction into account but also the magnitude of the difference. As a result, the Wilcoxin test is generally more powerful than the sign test.

The Sign Test Is Less Powerful Than the Wilcoxin Signed