The power of a statistical test is the probability of
A)failing to reject a false .
B)failing to reject a true .
C)rejecting a false .
D)rejecting a true .

Question

The power of a statistical test is the probability of
A)failing to reject a false . 
B)failing to reject a true . 
C)rejecting a false . 
D)rejecting a true .

Quizplus · Accepted Answer

The power of a statistical test is the probability of correctly rejecting a false null hypothesis (Type II error). Therefore, the correct choice is C, which says that the power is the probability of rejecting a false null hypothesis. The other choices are incorrect because A is the probability of making a Type II error, B is the probability of not making a Type II error when the null hypothesis is true, and D is the probability of making a Type I error.

The Power of a Statistical Test Is the Probability of