If a test of hypothesis has a Type I error probability (α)of 0.01,it means that
A) if the null hypothesis is false, you reject it 1% of the time.
B) if the null hypothesis is true, you reject it 1% of the time.
C) if the null hypothesis is false, you don't reject it 1% of the time.
D) if the null hypothesis is true, you don't reject it 1% of the time.

Question

Quizplus · Accepted Answer

A Type I error occurs when the null hypothesis is actually true, but you reject it based on your sample data. A Type I error probability of 0.01 means that there is a 1% chance of making this error when the null hypothesis is actually true. Therefore, if the null hypothesis is true, you will reject it 1% of the time.

If a Test of Hypothesis Has a Type I Error