Question: There is interaction in a two-way ANOVA model when a. The two factors are associated. b. Both factors have significant effects in the model without

There is interaction in a two-way ANOVA model when
a. The two factors are associated.
b. Both factors have significant effects in the model without interaction terms.
c. The difference in true means between two categories of one factor varies among the categories of the other factor.
d. The mean square for interaction is about the same size as the mean square error.

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