IMSL_ANOVA1: Analyzes a one-way classification model.
            IMSL_ANOVABALANCED: Balanced fixed, random, or mixed model.
            IMSL_ANOVAFACT: Analyzes a balanced factorial design with fixed effects.
            IMSL_ANOVANESTED: Nested random model.
            IMSL_MULTICOMP: Performs Student-Newman-Keuls multiple comparisons test.