Consider the following graphic results from a 2 x 2 factorial experiment. Do you think there is a significant A x B interaction?
A) Yes
B) No, it is not possible to have a significant interaction in a 2 x 2 factorial experiment.
C) No, the lines should be parallel for a significant interaction
D) none of these

Question

Consider the following graphic results from a 2 x 2 factorial experiment.  Do you think there is a significant A x B interaction?
A) Yes 
B) No, it is not possible to have a significant interaction in a 2 x 2 factorial experiment. 
C) No, the lines should be parallel for a significant interaction 
D) none of these

Quizplus · Accepted Answer

There appears to be a significant interaction between factors A and B, as the lines are not parallel and do not cross at a single point. Therefore, the effect of A on the outcome depends on the level of B, and vice versa.

Consider the Following Graphic Results from a 2 X 2