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Proposal of k Sample Tests for Bivariate Censored Data for Nondecreasing Ordered Alternatives
Authors:Brenda L Krogen  Rhonda C Magel
Abstract:Tests are introduced which are designed to test for a nondecreasing ordered alternative among the survival functions of k populations consisting of multiple observations on each subject. Some of the observations could be right censored. A simulation study is conducted comparing the proposed tests on the basis of estimated power when the underlying distributions are multivariate normal. Equal sample sizes of 20 with 25% censoring, and 40 with both 25% and 50% censoring are considered for 3 and 4 populations. All of the tests hold their α‐values well. A recommendation is made as to the best overall test for the situations considered.
Keywords:Weighted logrank tests  Pseudo‐ranks  Bivariate normal distribution
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