Factorial Regression in GRM

Select Factorial regression on the General Regression Models Startup Panel - Quick tab to specify factorial multiple regression designs. In the subsequent Quick specs dialog box, specify one or more continuous predictor variables, and one or more dependent variables. Also, in that dialog you can specify a factorial design for the continuous predictors, up to a specified degree. For example, if three continuous predictor variables A, B, and C are selected, Statistica will by default construct all terms for the complete factorial design (of degree 3): A, B, C, A*B, A*C, B*C, A*B*C; if you request to only evaluate the factorial design up to degree 2, then the three-way interaction (A*B*C) will be dropped.

Factorial designs with continuous predictor variables are common in industrial experimentation (see Experimental Design and Response surface regression). For additional information, refer to the Introductory Overview and GRM - Index.