The data table InjectionMolding.jmp contains the experimental results from a 7-factor 27-3 fractional factorial design with four added centerpoints [from Myers and Montgomery, 1995, page 519, originally Montgomery, 1991]. Preliminary investigation determined that the mean response only seemed to vary with the first two factors, Mold Temperature, and Screw Speed, and the variance seemed to be affected by Holding Time.
Injection Molding Data
1.
Open the InjectionMolding.jmp sample data table.
2.
Select Analyze > Fit Model.
Fit Model Dialog
3.
Click Run.
Loglinear Variance Report Window