On the use of ridit analysis |
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Authors: | Jay H. Beder Robert C. Heim |
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Affiliation: | (1) Department of Mathematical Sciences, University of Wisconsin-Milwaukee, P.O. Box 413, 53201 Milwaukee, WI;(2) Statistical Analysis and Services Division, RM. 7487, U.S. Office of Personnel Management, 1900 E St., N.W., 20415 Washington, D.C. |
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Abstract: | Ridit analysis is statistical method for comparing ordinal-scale responses. In this paper, the extact variance and asymptotic distribution of the average ridit is developed, including the cases in which the reference group is sampled or the comparison group is finite. The appropriate use and interpretation of ridit analysis is also discussed.The authors wish to thank Andrew Klugh for this support, and the references and David Feigenbaum for their very helpful comments. |
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Keywords: | ordinal scale categorical scale asymptotic normality U-statistic ranks |
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