Bayes and Minimax Sample-Admissible Multivariate Selection Procedures
多元总体选择的贝叶斯与极小极大样本可容许程序AI 解读 ↓
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多元总体选择的贝叶斯与极小极大样本可容许程序AI 解读 ↓
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Let P be a class of independent populations each having an underlying multivariate normal distribution with unknown mean vector. Independent vector samples of common size n are drawn from each population in P. We say that a subset G of P is δ*-Pareto-optimal (in P) if no other population in P has the property that each component of its mean vector is larger by at least δ* ≥ 0 than the corresponding component of the mean vector of any given population in G. This article treats the problem of devising and evaluating strategies for selecting the (unique) subset G of P that is δ*-Pareto-optimal. We note that the set G as defined above is unique, nonempty, always exists, and may turn out to be the whole class P. Procedures devised to select the δ*-Pareto-optimal subset of populations are evaluated by means of loss functions that penalize the practitioner for the incorrect exclusion (inclusion) of populations that belong (do not belong) to the set G of δ*-Pareto-optimal populations. Minimax and Bayes procedures in this framework are discussed.