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Evaluation Review
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The Power of t and Wilcoxon Statistics

A Comparison

R.Clifford Blair

University of South Florida

J.J. Higgins

Kansas State University

Computer-generated Monte Carlo techniques were used to assess the relative power of Wilcoxon's rank-sum test and the independent means t test under a certain mixed normal distribution. Results showed a very largepoweradvantagefor the Wilcoxon statistic. This indicates that the very large advantages promised by asymptotic theory may be obtained with samples of sizes commonly encountered in social science research.

Evaluation Review, Vol. 4, No. 5, 645-656 (1980)
DOI: 10.1177/0193841X8000400506
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