If there are two independent variables in a repeated measures ...

[tth]

If there are two independent variables in a repeated measures factorial experiment, and one variable has three levels while the other has 4 levels, how many degrees of freedom are associated with the numerator of the F ratio of the interaction of the variables?
 
  a. 6 c. 12
  b. 7 d. can't say without more information

Question 2

If there are two independent variables in a repeated measures factorial experiment, each with three levels, how many degrees of freedom are associated with the numerator of the F ratio of the interaction of the variables?
 
  a. 9 c. 4
  b. 6 d. can't say without more information

[mmpiza]

Answer to Question 1

A
The df for the interaction equals (a - 1)(b - 1) where a is the number of levels of Factor A and b is the number of levels of Factor B.

Answer to Question 2

C
The df for the interaction equals (a - 1)(b - 1) where a is the number of levels of Factor A and b is the number of levels of Factor B.

[tth]

Excellent

[miss.ashley]

Gracias!