Suppose a researcher has made a decision that a certain pill is not effective at treating depression when, in reality, it is.What has the researcher done in this case?
A)The researcher has made a Type II error.
B)The researcher has made a Type I error.
C)The researcher has made a correct decision to reject the null hypothesis.
D)The researcher has made a correct decision to reject the alternative hypothesis.

Question

Quizplus · Accepted Answer

The researcher has made a Type II error, which occurs when the null hypothesis is incorrectly accepted when it should have been rejected. In this case, the null hypothesis likely stated that the pill has no effect on depression, and the researcher incorrectly concluded that this was true, failing to recognize the pill's effectiveness.

Suppose a Researcher Has Made a Decision That a Certain