The Annals of Statistics

Hypothesis testing on linear structures of high-dimensional covariance matrix

Shurong Zheng, Zhao Chen, Hengjian Cui, and Runze Li

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Abstract

This paper is concerned with test of significance on high-dimensional covariance structures, and aims to develop a unified framework for testing commonly used linear covariance structures. We first construct a consistent estimator for parameters involved in the linear covariance structure, and then develop two tests for the linear covariance structures based on entropy loss and quadratic loss used for covariance matrix estimation. To study the asymptotic properties of the proposed tests, we study related high-dimensional random matrix theory, and establish several highly useful asymptotic results. With the aid of these asymptotic results, we derive the limiting distributions of these two tests under the null and alternative hypotheses. We further show that the quadratic loss based test is asymptotically unbiased. We conduct Monte Carlo simulation study to examine the finite sample performance of the two tests. Our simulation results show that the limiting null distributions approximate their null distributions quite well, and the corresponding asymptotic critical values keep Type I error rate very well. Our numerical comparison implies that the proposed tests outperform existing ones in terms of controlling Type I error rate and power. Our simulation indicates that the test based on quadratic loss seems to have better power than the test based on entropy loss.

Article information

Source
Ann. Statist., Volume 47, Number 6 (2019), 3300-3334.

Dates
Received: March 2018
Revised: August 2018
First available in Project Euclid: 31 October 2019

Permanent link to this document
https://projecteuclid.org/euclid.aos/1572487394

Digital Object Identifier
doi:10.1214/18-AOS1779

Mathematical Reviews number (MathSciNet)
MR4025743

Subjects
Primary: 62H15: Hypothesis testing
Secondary: 62H10: Distribution of statistics

Keywords
Covariance matrix structure random matrix theory test of compound symmetric structure test of banded structure test of sphericity

Citation

Zheng, Shurong; Chen, Zhao; Cui, Hengjian; Li, Runze. Hypothesis testing on linear structures of high-dimensional covariance matrix. Ann. Statist. 47 (2019), no. 6, 3300--3334. doi:10.1214/18-AOS1779. https://projecteuclid.org/euclid.aos/1572487394


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Supplemental materials

  • Supplement to “Hypothesis testing on linear structures of high-dimensional covariance matrix”. This supplementary material consists of the technical proofs and additional numerical results.