If the p level is.0.05 and the null hypothesis is true, what is the probability of NOT making a Type I error (i.e., one will correctly fail to reject the null hypothesis)?
A) 0.05
B) 0.90
C) 0.95
D) 0.00

Question

Quizplus · Accepted Answer

If the p level is 0.05, then the significance level is also 0.05. This means that there is a 5% chance of making a Type I error (rejecting the null hypothesis when it is actually true). Therefore, the probability of NOT making a Type I error (i.e., correctly failing to reject the null hypothesis) is 95%, which corresponds to choice C.

If the P Level Is