If you decrease your alpha level from .05 to .01, you have
A) Also decreased the power of the test
B) Increased the probability that you will make a Type I error
C) Altered your effect size
D) Effectively decided to test more people

Question

Quizplus · Accepted Answer

Decreasing the alpha level from .05 to .01 reduces the probability of making a Type I error (rejecting a true null hypothesis), but it also makes it harder to detect a true effect if there is one, thus decreasing the power of the test.

If You Decrease Your Alpha Level from