This may be basic but I'm struggling to find a way around this in JMP. Pardon me if this has been discussed previously on this forum. I essentially want to statistically compare regression lines. However, these are polynomial curves. All the options I have tried in JMP fits a linear curve by default which is not a good fit for the data.
Briefly, I want to perform a hypothesis test to assess whether there are differences among the categories within my dataset. I am able to do this using the 'Fit Model' dialog. But I am unable to the regression as 3rd order polynomials. Hence, JMP automatically applies a linear fit.
Is there a way to tell JMP to perform polynomial fitting in the "Fit Model" dialog.
Your help is appreciated.
