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• W2967657961 abstract "Comparing two population means of network data is of paramount importance in a wide range of scientific applications. Many existing network inference solutions focus on global testing of entire networks, without comparing individual network links. Besides, the observed data often take the form of vectors or matrices, and the problem is formulated as comparing two covariance or precision matrices under a normal or matrix normal distribution. Moreover, many tests suffer from a limited power under a small sample size. In this article, we tackle the problem of network comparison, both global and simultaneous inferences, when the data come in a different format, i.e., in the form of a collection of symmetric matrices, each of which encodes the network structure of an individual subject. Such data format commonly arises in applications such as brain connectivity analysis and clinical genomics. We no longer require the underlying data to follow a normal distribution, but instead impose some moment conditions that are easily satisfied for numerous types of network data. Furthermore, we propose a power enhancement procedure, and show that it can control the false discovery, while it has the potential to substantially enhance the power of the test. We investigate the efficacy of our testing procedure through both an asymptotic analysis and a simulation study under a finite sample size. We further illustrate our method with an example of brain structural connectivity analysis." @default.
• W2967657961 created "2019-08-22" @default.
• W2967657961 creator A5017399049 @default.
• W2967657961 creator A5080427402 @default.
• W2967657961 date "2019-08-10" @default.
• W2967657961 modified "2023-09-26" @default.
• W2967657961 title "Hypothesis Testing for Network Data with Power Enhancement" @default.
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• W2967657961 doi "https://doi.org/10.48550/arxiv.1908.03836" @default.
• W2967657961 hasPublicationYear "2019" @default.
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