Understanding Power and Rules of Thumb for Determining Sample Sizes

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Authors

Carmen R. Wilson Van Voorhis · University of Wisconsin–La Crosse

Betsy L. Morgan · University of Wisconsin–La Crosse

Abstract

This article addresses the definition of power and its relationship to Type I and Type II errors. We discuss the relationship of sample size and power. Finally, we offer statistical rules of thumb guiding the selection of sample sizes large enough for sufficient power to detecting differences, associations, chi-square, and factor analyses.

Topics & Keywords

Advanced Statistical Methods and Models Optimal Experimental Design Methods

Publication Details

Published in: Tutorials in Quantitative Methods for Psychology

Volume 3, Issue 2, pp. 43-50

DOI: 10.20982/tqmp.03.2.p043

Field-Weighted Citation Impact: 2.09

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Understanding Power and Rules of Thumb for Determining Sample Sizes

Authors

Abstract

Topics & Keywords

Publication Details