If, in a 2 X 2 experiment, you know that main effectsexist for both factors, then you know
A) that an interaction is definitely present
B) that an interaction probably is present
C) that an interaction probably isn't present
D) nothing whatsoever about the interaction

Question

Quizplus · Accepted Answer

Main effects and interactions are independent of each other. Knowing that main effects exist does not provide any information about the presence or absence of an interaction.

If, in a 2 X 2 Experiment, You Know That