You complete a hypothesis test using $\alpha$ = .05,and based on the evidence from the sample,your decision is to reject the null hypothesis.If the treatment actually has no effect,which of the following is true?
A)You have made a Type I error.
B)You have made a Type II error.
C)You might have made a Type I error,but the probability is only 5% at most.
D)You have made the correct decision.

Question

Quizplus · Accepted Answer

Rejecting the null hypothesis when it is actually true is a Type I error. The significance level of the hypothesis test (α = .05) indicates that there is a 5% chance of making a Type I error. Therefore, if the null hypothesis is true, there is a possibility of having made a Type I error by rejecting it.

You Complete a Hypothesis Test Using α\alphaα = 05,and Based on the Evidence from the Sample,your Decision Is

You Complete a Hypothesis Test Using $\alpha$ = 05,and Based on the Evidence from the Sample,your Decision Is