Data Set 13-5: an F Value of 2

Multiple Choice

Data Set 13-5: An F value of 2.75 was obtained when an interaction mean square was divided by a error mean square. The degrees of freedom were 4 and 24.
-Refer to Data Set 13-5. The number of independent variables in this design must have been

A) 1
B) 2
C) 3
D) none of the other alternatives are correct.