If a researcher were to use a .01 level of significance rather than the .05 level,the probability of a Type II error would
A) not change.
B) decrease.
C) increase.
D) not able to tell without more information.

Question

Quizplus · Accepted Answer

Using a lower level of significance (such as .01 instead of .05) increases the stringency of the test and reduces the probability of a Type I error, but it also increases the probability of a Type II error (failing to reject a false null hypothesis). This is because the criteria for rejecting the null hypothesis becomes stricter, making it harder to reject even if it is actually false.

If a Researcher Were to Use a