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Ranking Procedures for Arbitrarily Restricted Observation
Vol. 23, No. 1 (Mar., 1967), pp. 65-78
Published by: International Biometric Society
Stable URL: http://www.jstor.org/stable/2528282
Page Count: 14
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It is shown that a statistic W proposed by Gehan [1965a] for comparing two sets of arbitrarily censored data, can be represented as the total of a sample from a readily defined finite population of scores: this approach simplifies both the method of computation and the determination of the permutation distribution of W and its variance, as well as justifying an assumption of asymptotic normality. A possible modification of the test by applying the Wilcoxon rank-sum procedure to the sample of scores is discussed. Possible patterns of censoring are considered, and criteria are given for deciding whether any two samples can be compared without bias.
Biometrics © 1967 International Biometric Society