What is familywise error?
A) The approximate standard deviation of a statistical sample population
B) The amount of variation or dispersion of a set of values
C) The error of rejecting a null hypothesis when it is true
D) The probability of making one or more false discoveries when performing multiple hypotheses tests

Question

Quizplus · Accepted Answer

Familywise error refers to the probability of making at least one Type I error (rejecting a true null hypothesis) across multiple hypothesis tests. When multiple comparisons are made, the chance of incorrectly rejecting a true null hypothesis increases, hence the focus on controlling the familywise error rate.

What Is Familywise Error