How can I evaluate a full factorial design with a quadratic regression model?
Hi there, I'm new to the community and I'm still quite a beginner at JMP. I have the following problem: I did a full factorial 3 ^ 3 plan. The results I got are not linear but increase exponentially. When evaluating the "ordinary least squares" I only get a linear model. Is there a way to do a regression with a higher degree polynomial? If so, how could I do that? Thanks in advance.