which categorical variable has some levels and interaction what is categorical variable how can we test for interaction between different categorical variables? categorical variable definition statistics what variables have interaction levels what type of variable is $x_1? what is the categorical variable for a categorical variable categorical variables with a lot of levels and interaction what is the interaction between x and $x how to test interaction for categorical variable is categorical variables a categorical or non categorical variable? a categorical variable has why is it important that we test interaction with categorical variables? categorical variable with a lot of levels and interaction which is an example of a categorical variable? which a categorical variable has a lot of levels and interaction? what kind of interaction do categorical variables have if categorical variable has many levels and interactions should we not test interaction between what is categorical variable which categorical variable has a lot of levels and interaction?