You should not calculate a Tukey HSD when a factorial ANOVA shows a significant
A) main effect for A
B) main effect for B
C) interaction
D) all of the other alternatives are reasons not to calculate a Tukey HSD.

Question

Quizplus · Accepted Answer

Tukey's HSD (Honestly Significant Difference) test is used for pairwise comparisons after an ANOVA to determine which means are significantly different from each other. A significant interaction in a factorial ANOVA indicates that the effect of one factor depends on the level of another factor, complicating the interpretation of main effects and making it less straightforward to apply Tukey's HSD directly to all main effect comparisons without considering the interaction context.

You Should Not Calculate a Tukey HSD When a Factorial