This item has three questions. The matrix represents the results (means) from a 2 x 2 factorial study. One mean is not given. A represents one factor and B represents the other factor. A1 A2 B1 40 20...

This item has three questions. The matrix represents the results (means) from a 2 x 2 factorial study. One mean is not given. A represents one factor and B represents the other factor.

                        A1                   A2

B1                   40                    20

B2                   30

1. What value for the missing mean would result in no main effect for factor A? Explain.


2. What value for the missing mean would result in no main effect for factor B? Explain.


3. What value for the missing mean would result in no interaction?Explain.