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On testing whether new is better than used using randomly censored data. (English) Zbl 0613.62123
Under a model of random censorship, we consider the test $$H_ 0:$$ a life distribution is exponential, versus $$H_ 1:$$ it is new better than used, but not exponential. This paper introduces a class of tests by using the Kaplan-Meier estimator for the sample distribution in the uncensored model. Under some regularity conditions, the asymptotic normality of statistics is derived by an application of von Mises’ method, and asymptotically valid tests are obtained by using estimators for the null standard deviations. The efficiency loss in the proportional censoring model is studied and a Monte Carlo study of power is performed.

##### MSC:
 62N05 Reliability and life testing 62G10 Nonparametric hypothesis testing
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