A simultaneous test of mean vector and covariance matrix in high-dimensional settings

2021 ◽  
Vol 212 ◽  
pp. 141-152
Author(s):  
Mingxiang Cao ◽  
Peng Sun ◽  
Junyong Park
2019 ◽  
Vol 145 ◽  
pp. 338-344 ◽  
Author(s):  
Zhenzhen Niu ◽  
Jiang Hu ◽  
Zhidong Bai ◽  
Wei Gao

2017 ◽  
Vol 188 ◽  
pp. 82-93 ◽  
Author(s):  
Zhongying Liu ◽  
Baisen Liu ◽  
Shurong Zheng ◽  
Ning-Zhong Shi

2012 ◽  
Vol 01 (01) ◽  
pp. 1150002 ◽  
Author(s):  
DAMIEN PASSEMIER ◽  
JIAN-FENG YAO

In a spiked population model, the population covariance matrix has all its eigenvalues equal to units except for a few fixed eigenvalues (spikes). Determining the number of spikes is a fundamental problem which appears in many scientific fields, including signal processing (linear mixture model) or economics (factor model). Several recent papers studied the asymptotic behavior of the eigenvalues of the sample covariance matrix (sample eigenvalues) when the dimension of the observations and the sample size both grow to infinity so that their ratio converges to a positive constant. Using these results, we propose a new estimator based on the difference between two consecutive sample eigenvalues.


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