The degrees of freedom for the interaction term in a two-way ANOVA,with k groups,H blocks and L number of observations per cell,are:
A)k - 1
B)H - 1
C)(k - 1)(H - 1)
D)K-H-L + 1

Question

Quizplus · Accepted Answer

The degrees of freedom for the interaction term in a two-way ANOVA is given by (k - 1) x (H - 1). This is because the interaction term is testing the effect of one factor on the response that is different at different levels of the other factor. Therefore, we need to subtract one from each factor's degrees of freedom to account for the constraints imposed by the other factor.

The Degrees of Freedom for the Interaction Term in a Two-Way