Power Analyses When Comparing Trimmed Means

Authors

Rand R. Wilcox, University of Southern CaliforniaFollow
H. J. Keselman, University of ManitobaFollow

Abstract

Given a random sample from each of two independent groups, this article takes up the problem of estimating power, as well as a power curve, when comparing 20% trimmed means with a percentile bootstrap method. Many methods were considered, but only one was found to be satisfactory in terms of obtaining both a point estimate of power as well as a (one-sided) confidence interval. The method is illustrated with data from a reading study where theory suggests two groups should differ but nonsignificant results were obtained.

DOI

10.22237/jmasm/1020254820