what is the relationship between two factor variables that is dependent? how to plot an interaction term in gee what is the model gee how to use gee pack how to plot an interaction term what is the interaction term of a model how to plot interaction terms of gee models what type of interaction does the kee model use how to plot interactions which type of interaction is the model dependent variable what is the interaction term in gee how to plot interaction coefficients how to use the coefficients of a geepack function which coefficients are used in graphs of a 3ft model what kind of interaction term is m1-geeglm which model coefficient is used to plot the interaction what is the relationship between factor variables and interaction terms? why does the factor variable contin.var have two levels? how to plot two interactions in a gee model? what model contains a grouping variable with two different levels