The familywise error rate is
A) the probability of at least one Type I error.
B) the probability of no Type I errors.
C) the number of Type I errors that you are likely to make.
D) the probability of a Type II error.

Question

Quizplus · Accepted Answer

The familywise error rate is the probability of at least one Type I error occurring when multiple statistical tests are performed simultaneously. It is important to control for this rate, as the more tests you conduct, the higher the likelihood of making at least one false positive conclusion. Therefore, the familywise error rate corresponds to choice A - the probability of at least one Type I error.

The Familywise Error Rate Is