Main effects in the two-way ANOVA:
A) Must be reported when there are interaction effects between the independent variables.
B) Need not be reported when the interaction effect between the independent variables is statistically significant.
C) Indicate the differences produced by either Factor A or Factor B, independent of the other.
D) Both (b) and (c) are correct.

Question

Quizplus · Accepted Answer

Main effects in a two-way ANOVA refer to the individual effects of each independent variable on the dependent variable, regardless of the interaction between those independent variables. Therefore, they indicate the differences produced by either factor independently (C). While the presence of a significant interaction effect can influence the interpretation of main effects, it does not negate the necessity of reporting them (B), making both B and C correct in this context.

Main Effects in the Two-Way ANOVA