In a Two-Factor ANOVA,where a Is the Number of Factor

Multiple Choice

In a two-factor ANOVA,where a is the number of factor A levels and b is the number of factor B levels,the number of degrees of freedom for the interaction term is

A) (a − 1) (b − 1)
B) ab − 1
C) (a − 1) + (b − 1)
D) Unknown; need to know the number of replicates.