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arXiv 2201.03727stat.MEmath.STstat.TH
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代理数据的估计与推断及其遗传应用

Estimation and Inference with Proxy Data and its Genetic Applications

Sai Li, T. Tony Cai, Hongzhe Li

摘要:

现有的高维统计方法主要是建立在分析个人层面的数据。在这项工作中,我们研究的估计和推断的高维线性模型,我们只观察“代理数据”,其中包括边际统计量和样本协方差阵,计算的基础上不同的个人。提出了一种基于代理数据的回归系数向量及其线性泛函的估计和推断的速率优化方法。此外,我们表现出内在的局限性,在代理数据为基础的推理:最小最大的最优估计率是慢于在传统的情况下,观察到的个人数据,测试和多重检验的权力不去一个信号强度趋于无穷大。这些有趣的发现说明通过模拟研究和分析的数据集有关的遗传协会的后肢肌肉重量在小鼠种群。

英文摘要:

Existing high-dimensional statistical methods are largely established for analyzing individual-level data. In this work, we study estimation and inference for high-dimensional linear models where we only observe "proxy data", which include the marginal statistics and sample covariance matrix that are computed based on different sets of individuals. We develop a rate optimal method for estimation and inference for the regression coefficient vector and its linear functionals based on the proxy data. Moreover, we show the intrinsic limitations in the proxy-data based inference: the minimax optimal rate for estimation is slower than that in the conventional case where individual data are observed; the power for testing and multiple testing does not go to one as the signal strength goes to infinity. These interesting findings are illustrated through simulation studies and an analysis of a dataset concerning the genetic associations of hindlimb muscle weight in a mouse population.

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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