Homogeneity-of-Slopes Model in GRM

Select Homogeneity-of-slopes model on the General Regression Models Startup Panel - Quick tab to specify analysis of covariance (ANCOVA and MANCOVA) designs, that include all interactions between the continuous predictors (covariates) and categorical predictor variables.

In the subsequent Quick specs dialog box, specify one or more categorical predictor variables, one or more continuous predictor variables (covariates), and one or more dependent variables (ANCOVA or MANCOVA). By default, Statistica will evaluate a design that includes interaction effects between all continuous predictors and all main effects and interactions for the factorial design (for the categorical predictors). If any of the continuous predictor by categorical predictor interaction effects are statistically significant, the homogeneity of slopes hypothesis can be rejected. For more information, refer to the Introductory Overview and GRM - Index.