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Annual Progress Seminar |
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Date |
Tuesday, 27 Feb, 4 pm |
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Venue |
Ramanujan Hall |
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Host |
Monika Bhattacharjee |
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speaker |
Shiv Kumar Yadav |
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Affiliation |
IIT Bombay |
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Title |
Two sample tests for high dimensional means under missing observations |
Abstract: Statistical test for high-dimensional means under missing observations seems to be very rare in the literature. We propose a new two-sample test for high-dimensional means based on independent observations with missing values. The critical region of the proposed test is based on a bootstrap estimate of the sample quantiles of the proposed test statistic. Unlike the existing tests, this test does not require any distributional assumptions or any particular correlation structure of the covariance matrices. We establish the Gaussian approximation result for the proposed test statistic which is a non-trivial extension of the two-sample Gaussian approximation result with no missing values. The rate of accuracy of the bootstrap approximation of the sample quantile of the proposed test statistic is also derived. This Gaussian approximation result and the accuracy of the bootstrap estimators together provide the theoretical guarantees on the size and power of the proposed test.