SAS Statistics by Example

Chapter 13  Power and Sample Size

Introduction

Computing the Sample Size for an Unpaired t-Test

Computing the Power of an Unpaired t-Test

Computing Sample Size for an ANOVA Design

Computing Sample Sizes (or Power) for a Difference in Two Proportions

Using the SAS Power and Sample Size Interactive Application

Conclusions

Introduction

SAS has extensive programs for determining power and sample size for a wide variety of designs. You have a choice: you can run PROC POWER (or GLMPOWER for more advanced GLM designs) and make your requests using appropriate statements or you can choose to run an interactive program called SAS Power and Sample Size that allows you to use a menu system to perform your calculations. The SAS Power and Sample Size program ...