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SAS/STAT Software

GLMPOWER Procedure


Power and sample size analysis optimizes the resource usage and design of a study, improving chances of conclusive results with maximum efficiency. The GLMPOWER procedure performs prospective power and sample size analysis for linear models, with a variety of goals:

The following are highlights of the GLMPOWER procedure's features:

  • statistical analyses that are covered include Type III F tests and contrasts of fixed effects in univariate and multivariate linear models, optionally with covariates
  • for multivariate models, you can choose from the following tests:
    • Wilks' lambda
    • Hotelling-Lawley trace
    • Pillai's trace
  • for the univariate approach to repeated measures, you can choose from the following types of F tests:
    • uncorrected
    • Greenhouse-Geisser
    • Huynh-Feldt
    • Box conservative
  • supports BY group processing, which enables you to obtain separate analyses for grouped observations
  • creates a SAS data set that corresponds to any output table
  • automatically creates graphs by using ODS Graphics

For further details see the SAS/STAT User's Guide: The GLMPOWER Procedure
( PDF | HTML )

Examples