文章基本信息

标题：Estimation in Step-Stress Accelerated Life Tests for Power Generalized Weibull Distribution with Progressive Censoring
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作者：M. M. Mohie EL-Din ; S. E. Abu-Youssef ; Nahed S. A. Ali 等
期刊名称：Advances in Statistics
印刷版ISSN：2356-6892
出版年度：2015
卷号：2015
DOI：10.1155/2015/319051
出版社：Hindawi Publishing Corporation
摘要：Based on progressive censoring, step-stress partially accelerated life tests are considered when the lifetime of a product follows power generalized Weibull distribution. The maximum likelihood estimates (MLEs) and Bayes estimates (BEs) are obtained for the distribution parameters and the acceleration factor. In addition, the approximate and bootstrap confidence intervals (CIs) of the estimators are presented. Furthermore, the optimal stress change time for the step-stress partially accelerated life test is determined by minimizing the asymptotic variance of MLEs of the model parameters and the acceleration factor. Simulation results are carried out to study the precision of the MLEs and BEs for the parameters involved.