The finding of a significant main effect in two-way analysis of variance may not be open to straight-forward interpretation when
A) there is a significant interaction effect
B) one main effect is significant but the other is not
C) both main effects are significant
D) sample size is small

Question

Quizplus · Accepted Answer

When there is a significant interaction effect, it means that the effect of one independent variable on the dependent variable depends on the level of the other independent variable, complicating the interpretation of main effects.

The Finding of a Significant Main Effect in Two-Way Analysis