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.
Video segment also included in Bill Worley's
billw@jmp Specifying Fitting Models, Modeling Continuous Data webcast video.