I have covariates X, Y, and response Z.
X is discrete ("A", "B", "C"), Y is continuous (from 0 - 100).
The issue is that for X = A, Y is usually in the range 0-50. From X = C, Y is usually in the range 50-100. Only for X = B does Y cross the entire 0-100 range.
What does this mean for my analysis? How do I handle this situation? I want to use X and Y as covariates, yet above problem almost seems to indicate that I should do a regression on X and Y (intuitively, if there IS a correlation, then it should probably be X which causes Y, i.e. E(Y) = F(X)).