Problem with the creation of a linear model
Hello,I'm trying to create a linear model that predicts glucose per WD. Models are created for WDs ranging from 1 to 3, but no model is created for my WD=4. The curve for the prediction vs observed values is not created. The r-squared is 1, which is very strange. In the "effect tests" section, there is no Prob.> F. When I remove a quadratic term, I get a model. When I try to create a step-by-ste...