Modeling: Why wouldn't you add interactive terms first when building a model?Start simple and look at main effects first in the Effect Summary. You don't want to add interactive terms to the model if they are not needed.
The
Effect Summary Report is available in the following personalities: Standard Least Squares, Nominal and Ordinal Logistic, Proportional Hazard, Parametric Survival and Generalized Linear Model.
Basic Data Analysis and Modeling