Cribbie, RobertWilcox, RandBewell, CarmenKeselman, H. J.2018-06-052018-06-052007Cribbie, 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/1177992660https://doi.org/10.22237/jmasm/1177992660http://hdl.handle.net/10315/34628Several 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.enWelch test on ranksnonparametric statisticsnonnormalityheteroscedasticitymean equalityArticlehttps://digitalcommons.wayne.edu/jmasm/vol6/iss1/12/