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Educational and Psychological…2
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Toothaker, Larry E.3
Feir-Walsh, Betty J.1
Keselman, H. J.1
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Comparison of Tukey's T-Method and Scheffe's S-Method for Various Numbers of All Possible Differences of Averages Contrasts under Violation of Assumptions
Peer reviewed Peer reviewed
Keselman, H. J.; Toothaker, Larry E. – Educational and Psychological Measurement, 1974
Descriptors: Analysis of Variance, Comparative Analysis, Hypothesis Testing, Research Methodology
An Empirical Investigation of the Permutation T-Test as Compared to Student's T-Test and the Mann-Whitney U-Test. Report from the Quality Verification Program.
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Toothaker, Larry E. – 1972
The area investigated in the present study is the comparison of the permutation t-test with Student's t-test and the Mann-Whitney U-test. The comparison was made for small samples for three distributions, including a normal distribution, a uniform distribution, and a skewed distribution. The properties of each test compared were the probability of…
Descriptors: Comparative Analysis, Hypothesis Testing, Mathematical Models, Probability
An Empirical Comparison of the ANOVA F-test, Normal Scores Test and Kruskal-Wallis Test under Violation of Assumptions
Peer reviewed Peer reviewed
Feir-Walsh, Betty J.; Toothaker, Larry E. – Educational and Psychological Measurement, 1974
Descriptors: Analysis of Variance, Comparative Analysis, Hypothesis Testing, Nonparametric Statistics