How to Compare Slopes (to each other - not to the mean slope) in linear modeling
Hi everyone, @martindemel in JMP 18.0.1, I am launching a linear model :Y ~ X1 * X2Where :- Y is the continuous response- X1 is a continuous regressor- X2 is a categorical regressor (3 categories named "A", "B", "C")Some people call this model an ANCOVA From this I get :an intercept and a slope (over X1) per categories of X2., like in the following graphic: I would like to compare these slopes aga...