Main Effects ANOVA in General ANOVA/MANOVA

Select Main effects ANOVA from the General ANOVA/MANOVA - Quick tab to specify main effects only ANOVA or MANOVA designs. In the subsequent Quick specs dialog box, you can specify up to four categorical predictor variables. STATISTICA will estimate and evaluate the main-effects-only model. Those types of models are frequently used in the area of industrial experimentation to screen large numbers of factors in highly fractionalized designs (e.g., 2-level screening designs; see Experimental Design). This option should also be chosen when you want to analyze balanced incomplete (nested) designs, when only the main effects can be estimated. Note that if you want to select five or more categorical predictor variables, you must use the General Linear Models module. For more information, refer to the GLM Introductory Overview.