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Journal of University of Chinese Academy of Sciences ›› 2022, Vol. 39 ›› Issue (3): 302-308.DOI: 10.7523/j.ucas.2020.0038

• Research Articles • Previous Articles     Next Articles

Research of confidence intervals for precision matrix in high dimensional network data

ZHENG Zemin, ZHOU Huiting   

  1. Department of Statistics and Finance, School of Management, University of Science and Technology of China, Hefei 230026, China
  • Received:2020-04-15 Revised:2020-06-28

Abstract: With the development of the Internet, science, and technology, the surge of bigdata on an unprecedented scale has brought complex network data between different individuals. It is practical significance to uncover the network connection by studying the confidence intervals of the precision (inverse covariance) matrix in graphical models. One natural and important question is how to efficiently obtain confidence intervals of the precision matrix. This paper proposes the De-ISEE (De-innovated scalable efficient estimation) statistic, whose confidence intervals enjoy efficient computation while maintaining a desirable coverage rate. Both average coverage and computational advantages of the methods have been demonstrated by our numerical studies in network data. Moreover, this paper applies the De-ISEE method to riboflavin data and gene expression data, and finds that De-ISEE method could be an important tool for studying gene association.

Key words: network data, high-dimensional graphical models, confidence intervals, precision matrix, De-sparsified statistic

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