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A Nonparametric K-Sample Test for Equality of Slopes

Rutgers University

Stephen L. Koffler

N. J. State Dept. of Education

The development of a nonparametric K-sample test for equality of slopes using Puri's generalized L statistic is presented. The test is recommended when the assumptions underlying the parametric model are violated. For this procedure original data are replaced by either ranks or normal scores. A discussion is presented on which data substitution procedure to use. Ranks are suggested when the data have heavy tails and normal scores for data with light tails. An example is carried out illustrating the test process.

Educational and Psychological Measurement, Vol. 46, No. 3, 537-542 (1986)
DOI: 10.1177/0013164486463005


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