The power of a statistical test is A) the probability of rejecting H₀when it is true. B) the probability of not rejecting H₀when it is true. C) the probability of rejecting H₀ when it is false. D) the probability of not rejecting H₀ when it is false.

Question

Quizplus · Accepted Answer

The power of a statistical test is the probability of rejecting the null hypothesis (H0) when it is false. In other words, it is the ability of the test to detect a true difference or effect if one exists. Option A is incorrect because if H0 is true, the test should not reject it. Option B is incorrect because if H0 is true, failing to reject it is the correct decision. Option D is incorrect because if H0 is false, the correct decision is to reject it, not to not reject it.

The Power of a Statistical Test Is