Changing the alpha level from .05 to .01 would
A) decrease the risk of a type I and a type II error.
B) increase the risk of a type I and a type II error.
C) decrease the risk of a type I error and increase the risk of a type II error.
D) increase the risk of a type I error and decrease the risk of a type II error.

Question

Quizplus · Accepted Answer

Changing the alpha level from .05 to .01 decreases the risk of a Type I error (falsely rejecting the null hypothesis) because it requires stronger evidence to reject the null hypothesis. However, it increases the risk of a Type II error (failing to reject a false null hypothesis) because it makes the criteria for rejecting the null hypothesis more stringent, potentially missing a true effect.

Changing the Alpha Level from