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Biometrika 1987 74(3):599-607; doi:10.1093/biomet/74.3.599
© 1987 by Biometrika Trust
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Tests for location with k samples and censored data

IAN R. JAMES

Department of Mathematics, University of Western Australia Nedlands, Western Australia 6009, Australia

Tests which are specific for location are developed in the k-sample situation with right-censored data. The tests are based on general estimating functions, and do not require full parametric assumptions for large samples, but in general they are not based only on ranks. One class of tests allows shapes to differ in the k populations, and includes as a special case the median test of Brookmeyer & Crowley (1982). If the distributions are assumed to differ at most in location modified tests are suggested in which survival function estimates are obtained by pooling the data from all samples. Prentice's (1978) median test, with minor modifications, is included in this class.

Key Words: Censored data location test • Distribution-free method • Mean test • Median test


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