Testing the equality of multivariate means when $$p>n$$ p > n by combining the Hotelling and Simes tests

Tzviel Frostig () and Yoav Benjamini
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Tzviel Frostig: Tel Aviv University
Yoav Benjamini: Tel Aviv University

TEST: An Official Journal of the Spanish Society of Statistics and Operations Research, 2022, vol. 31, issue 2, No 9, 390-415

Abstract: Abstract We propose a method of testing a shift between mean vectors of two multivariate Gaussian random variables in a high-dimensional setting incorporating the possible dependency and allowing $$p > n$$ p > n . This method is a combination of two well-known tests: the Hotelling test and the Simes test. The tests are integrated by sampling several dimensions at each iteration, testing each using the Hotelling test, and combining their results using the Simes test. We prove that this procedure is valid asymptotically. This procedure can be extended to handle non-equal covariance matrices by plugging in the appropriate extension of the Hotelling test. Using a simulation study, we show that the proposed test is advantageous over state-of-the-art tests in many scenarios and robust to violation of the Gaussian assumption.

Keywords: Location alternative; Global null; Permutation testing; 62F03; 62F05; 62G10 (search for similar items in EconPapers)
Date: 2022
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DOI: 10.1007/s11749-021-00781-z

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