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arXiv 2201.08492math.STstat.MEstat.TH
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高维数据完全独立性检验的经验似然方法

Empirical likelihood method for complete independence test on high dimensional data

Yongcheng Qi, Yingchao Zhou

摘要:

给定来自$p$维随机向量的大小为$n$的随机样本,其中$n$和$p$都很大,我们感兴趣的是测试随机向量的$p$分量是否相互独立。这就是所谓的完全独立性测试。在多元正态情况下,它等价于测试相关阵是否是单位矩阵。本文提出了一种基于平方样本相关系数的多元正态数据完全独立性检验的单侧经验似然方法。当$n$和$p$都趋于无穷大时,我们的单侧经验似然检验统计量的极限分布被证明是$Z^2I(Z>0)$,其中$Z$是标准正态随机变量.为了提高经验似然检验统计量的功效,我们还引入了一种重标度的经验似然检验统计量。我们进行了广泛的模拟研究,以比较的重新缩放的经验似然方法和其他两个统计量的平方样本相关系数的总和的性能。

英文摘要:

Given a random sample of size $n$ from a $p$ dimensional random vector, where both $n$ and $p$ are large, we are interested in testing whether the $p$ components of the random vector are mutually independent. This is the so-called complete independence test. In the multivariate normal case, it is equivalent to testing whether the correlation matrix is an identity matrix. In this paper, we propose a one-sided empirical likelihood method for the complete independence test for multivariate normal data based on squared sample correlation coefficients. The limiting distribution for our one-sided empirical likelihood test statistic is proved to be $Z^2I(Z>0)$ when both $n$ and $p$ tend to infinity, where $Z$ is a standard normal random variable. In order to improve the power of the empirical likelihood test statistic, we also introduce a rescaled empirical likelihood test statistic. We carry out an extensive simulation study to compare the performance of the rescaled empirical likelihood method and two other statistics which are related to the sum of squared sample correlation coefficients.

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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