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J Dent Res 42(1): 54-62, 1963
© 1963 International and American Associations for Dental Research
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Studies in the Design and Analysis of Dental Experiments. 6. Non-parametric Tests (Independent Samples with Ordinal Scales)

NEAL W. CHILTON 1, SHIRLEY STERNBERG 1, and JOHN W. FERTIG 1

1 School of Public Health and Administrative Medicine of the Faculty of Medicine, Columbia University, New York, New York

Two relatively new tests for ordinal measurements were described. These were rank-order tests: the Wilcoxon Rank Sum Test for the case of two independent samples and the Kruskal-Wallis Test for the case of more than two independent samples. The tests were illustrated with data consisting of P-M-A scores of two groups of individuals and periodontal scores of three groups of rats, respectively. An analysis-of-variance approach was described that facilitates the calculation of appropriate significance tests.

Submitted on April 9, 1962




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S. Sternberg, J. W. Fertig, and N. W. Chilton
Studies in the Design and Analysis of Dental Experiments. 7. Non-parametric Tests (Correlated Samples with Ordinal Scales)
Journal of Dental Research, January 1, 1963; 42(1): 146 - 153.
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