which variable must be skipped to be a real interaction in a GLM is a 2-way interaction real is interaction real is the interaction a real interaction or not what if there is an interaction with one main effect how can you know if an interaction is real is the interaction coefficient the same as the coefficient of a dummy variable? which statement is correct? is interaction two way interaction what is the coefficient of an interaction in math terms how to interpret interaction coefficients how to interpret coefficient of two-way interaction if the main effect is skipped what is the interaction term which coefficient is the real coefficient of a interaction? what is the main interaction coefficient why is the interaction term called real interaction how do you interpret the coefficients of two interaction terms is this interaction a real interaction are interactions dummies is an interaction real