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Estimation of common location parameter of several heterogeneous exponential populations based on generalized order statistics

机译:基于广义秩序统计的多个异构指数群体的共同位置参数估算

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摘要

In this article, several independent populations following exponential distribution with common location parameter and unknown and unequal scale parameters are considered. From these populations, several independent samples of generalized order statistics (gos) are drawn. Under the setup ofgos, the problem of estimation of common location parameter is discussed and various estimators of common location parameter are derived. The authors obtained maximum likelihood estimator (MLE), modified MLE and uniformly minimum variance unbiased estimator of common location parameter. Furthermore, under scaled-squared error loss function, a general inadmissibility result of invariant estimator is proposed. The derived results are further reduced for upper record values which is a special case ofgos. Finally, simulation study and real life example are reported to show the performances of various competing estimators in terms of percentage risk improvement.
机译:在本文中,考虑了具有共同位置参数和未知和不相等的参数的指数分布之后的几个独立群体。 从这些人群来看,绘制了几个广义订单统计数据(GOS)的独立样本。 在建立的OFGOS下,讨论了估计公共位置参数的估计问题,导出了公共位置参数的各种估计器。 作者获得了最大似然估计器(MLE),修改的MLE和均匀的最小方差的公共位置参数的非偏见估计器。 此外,在缩放平方误差函数下,提出了不变估计器的一般不当结果。 对于高度的特殊情况,衍生结果进一步降低了。 最后,据报道,仿真研究和现实生活示例在风险改善百分比方面展示了各种竞争估计人的表现。

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