Some Nonparametric Group Sequential-Type Tests for Two Population Problems

Abstract

In the present paper we propose some group sequential-typo nonparametric tests for clinical trials with two treatments by taking observations in pairs and by adopting an inverse binomial scheme of sampling. Competitors of the proposed tests are aiso obtained. Exact and asymptotic results on some performance characteristics of the tests are studied and examined. Unbiasedness and consistency of the proposed tests are also studied.