%0 Journal Article
%T Understanding Power and Rules of Thumb for Determining Sample Sizes
%A Carmen R. Wilson Van Voorhis
%A Betsy L. Morgan
%J Tutorials in Quantitative Methods for Psychology
%D 2007
%I Universit¨¦ de Montr¨¦al
%X 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.
%K Statistics
%K statistical power
%U http://www.tqmp.org/Content/vol03-2/p043/p043.pdf