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arXiv 1608.02241math.STstat.TH
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成组检验问题中的序贯估计

Sequential estimation in the group testing problem

Gregory Haber, Yaakov Malinovsky, Paul Albert

摘要:

使用混合抽样的估计长期以来一直是组检验文献中感兴趣的领域。这种研究主要集中在假设使用固定的抽样计划(i),虽然最近的一些论文提出了替代的序贯设计,直到预定数量的阳性测试(ii)的样本。一个主要的考虑因素,包括在新的工作顺序计划,是建设去偏估计,减少或保持膨胀的均方误差。然而,在上述或其他抽样设计下,无偏估计实际上是否可能,尚未在文献中建立。在本文中,我们介绍了一个设计,直到一个固定数量的负样本(iii),并表明在此模型下存在一个无偏估计,而无偏估计是不可能的任何前述设计(i)和(ii)。我们提出了新的估计根据不同的抽样计划,无论是无偏的或已减少相对于那些已经在使用的偏差,以及普遍改善的均方误差。数值研究是为了比较设计的偏差和均方误差在实际情况下与中小样本量。

英文摘要:

Estimation using pooled sampling has long been an area of interest in the group testing literature. Such research has focused primarily on the assumed use of fixed sampling plans (i), although some recent papers have suggested alternative sequential designs that sample until a predetermined number of positive tests (ii). One major consideration, including in the new work on sequential plans, is the construction of debiased estimators which either reduce or keep the mean square error from inflating. Whether, however, under the above or other sampling designs unbiased estimation is in fact possible has yet to be established in the literature. In this paper, we introduce a design which samples until a fixed number of negatives (iii), and show that an unbiased estimator exists under this model, while unbiased estimation is not possible for either of the preceding designs (i) and (ii). We present new estimators under the different sampling plans that are either unbiased or that have reduced bias relative to those already in use as well as generally improve on the mean square error. Numerical studies are done in order to compare designs in terms of bias and mean square error under practical situations with small and medium sample sizes.

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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