In an ANOVA, the main effect for factor A, which had two levels, was found to be statistically significant. What multiple comparison technique should be used?
A) Tukey
B) Scheffé
C) Either Tukey or Scheffé
D) None

Question

Quizplus · Accepted Answer

When a factor has only two levels, a statistically significant main effect does not require a multiple comparison test because there are no multiple groups to compare beyond the two levels.

In an ANOVA, the Main Effect for Factor A, Which