The following data represent the means for each treatment condition in a two-factor experiment.What pattern of results is shown in the data?
A1 A2

B1

M = 20

M = 20

B2

M = 30

M = 50
A)main effects for both factors and an interaction
B)main effects for both factors and no interaction
C)a main effect for factor A, no main effect for factor B, and no interaction
D)a main effect for factor A and an interaction but no main effect for factor B

Question

The following data represent the means for each treatment condition in a two-factor experiment.What pattern of results is shown in the data?
​ A1 A2
​
​
B1
​
M = 20
​
M = 20
​
B2
​
M = 30
​
M = 50
A)​main effects for both factors and an interaction
B)​main effects for both factors and no interaction
C)a main effect for factor A, no main effect for factor B, and no interaction
D)​a main effect for factor A and an interaction but no main effect for factor B

Quizplus · Accepted Answer

The data show a main effect for factor A (the means for A1 and A2 differ), a main effect for factor B (the means for B1 and B2 differ), and an interaction (the difference between the means for A1 and A2 is different for B1 and B2).

The Following Data Represent the Means for Each Treatment Condition