The post-hoc test which holds the familywise error rate at .05 by running each individual test at the c/alpha level (# comparisons/alpha) is the
A) Fisher's LSD.
B) Bonferroni.
C) Newmann Keuls.
D) Tukey test.

Question

Quizplus · Accepted Answer

The Bonferroni correction is the most appropriate choice because it controls the familywise error rate at a desired level by adjusting the alpha level for each individual test based on the number of comparisons being made. This ensures that the overall probability of making at least one Type I error across all tests does not exceed the desired level. Fisher's LSD test, Newman Keuls test, and Tukey test do not control the familywise error rate in the same way as the Bonferroni correction.

The Post-Hoc Test Which Holds the Familywise Error Rate at .05