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arXiv 1702.07804stat.ME
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选择总体均值估计的约束条件似然法

A Constrained Conditional Likelihood Approach for Estimating the Means of Selected Populations

Claudio Fuentes, Vik Gopal

摘要:

给定p个独立的正态总体,我们考虑估计这些总体的平均值的问题,即基于观察到的数据,给出最强的信号。我们明确的条件上的排名的样本均值,并考虑一个约束条件的极大似然(CCMLE)的方法,避免使用任何先验和人口之间的任何稀疏性要求的手段。我们的研究结果表明,如果观察到的均值太接近,我们实际上应该使用总均值来估计具有较大样本均值的总体的均值。如果它们之间的距离超过了一定的阈值,我们就应该将观测到的均值相互缩小。正如直觉所暗示的那样,只有当观察到的平均值相差很远时,我们才能得出结论,分离的程度和随之而来的排名不是偶然的。与其他方法不同的是,我们的方法不需要预先指定选定的人口数量和建议CCMLE是能够执行同时推理。我们的方法,这是概念上简单,可以很容易地适应纳入其他选择标准。选择总体,极大似然,约束极大似然估计,选择后推断

英文摘要:

Given p independent normal populations, we consider the problem of estimating the mean of those populations, that based on the observed data, give the strongest signals. We explicitly condition on the ranking of the sample means, and consider a constrained conditional maximum likelihood (CCMLE) approach, avoiding the use of any priors and of any sparsity requirement between the population means. Our results show that if the observed means are too close together, we should in fact use the grand mean to estimate the mean of the population with the larger sample mean. If they are separated by more than a certain threshold, we should shrink the observed means towards each other. As intuition suggests, it is only if the observed means are far apart that we should conclude that the magnitude of separation and consequent ranking are not due to chance. Unlike other methods, our approach does not need to pre-specify the number of selected populations and the proposed CCMLE is able to perform simultaneous inference. Our method, which is conceptually straightforward, can be easily adapted to incorporate other selection criteria. Selected populations, Maximum likelihood, Constrained MLE, Post-selection inference

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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