Question

5. A Type I error is the mistake of __________ when it is actually true. A) Failing to reject the null hypothesis.B) Failing to reject the alternative hypothesis.C) Rejecting the null hypothesis.D) Rejecting the alternative hypothesis.

Answer 1

A type I error in hypothesis testing is the rejection of a true null hypothesis,

That is, in a situation whereby the null hypothesis is true but the observer mistakenly reject the decision instead of accepting the decision. Then, we say a Type I error has been made.

Hence, the correct option is C: Rejecting the null hypothesis when it is actually true