PSS offers power and sample size calculations for analysis of variance in two tasks: one-way ANOVA and general linear univariate models. Optional contrasts are available in both tasks.

In the one-way ANOVA task, you can solve for sample size per group as well as total sample size. The contrast facility for the one-way ANOVA task enables you to select orthogonal polynomials as well as to specify contrast coefficients. For more information about power and sample size analysis for one-way ANOVA, see Chapter 67, The POWER Procedure.

In the general linear univariate models task, you specify linear models for a single dependent variable. Type III tests and contrasts of fixed effects are included, and the model can include covariates. For more information about power and sample size analysis for linear univariate models, see Chapter 41, The GLMPOWER Procedure.