If a test of hypothesis has a Type I error probability of .05,this means that:
A)if the null hypothesis is true,we don't reject if 5% of the time.
B)if the null hypothesis is true,we reject it 5% of the time.
C)if the null hypothesis is false,we don't reject it 5% of the time.
D)if the null hypothesis is false,we reject it 5% of the time.

Question

Quizplus · Accepted Answer

A Type I error occurs when we reject the null hypothesis even though it is true. The probability of committing a Type I error is denoted by alpha and is usually set at .05. Therefore, if the null hypothesis is true, we reject it 5% of the time (choice B is correct).

If a Test of Hypothesis Has a Type I Error