Tests for Treatment Group Equality When Data are Nonnormal and Heteroscedastic
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Date
2007
Authors
Cribbie, Robert
Wilcox, Rand
Bewell, Carmen
Keselman, H. J.
Journal Title
Journal ISSN
Volume Title
Publisher
Wayne State University Library System
Abstract
Several tests for group mean equality have been suggested for analyzing nonnormal and heteroscedastic data. A Monte Carlo study compared the Welch tests on ranked data and heterogeneous, nonparametric statistics with previously recommended procedures. Type I error rates for the Welch tests on ranks and the heterogeneous, nonparametric statistics were well controlled with a slight power advantage for the Welch tests on ranks.
Description
Keywords
Welch test on ranks, nonparametric statistics, nonnormality, heteroscedasticity, mean equality
Citation
Cribbie, R. A., Wilcox, R., Bewell, C. & Keselman, H. J. (2007). Tests for treatment group equality when data are nonnormal and heteroscedastic. Journal of Modern Applied Statistical Methods, 6, 117-132. doi: 10.22237/jmasm/1177992660