On a new multivariate two-sample test

Authors:
L. Baringhaus;C. Franz
Affiliations:
Institut für Mathematische Stochastik, Universität Hannover, Welfengarten 1, 30167 Hannover, Germany;Institut für Mathematische Stochastik, Universität Hannover, Welfengarten 1, 30167 Hannover, Germany
Venue:
Journal of Multivariate Analysis
Year:
2004

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Abstract

In this paper we propose a new test for the multivariate two-sample problem. The test statistic is the difference of the sum of all the Euclidean interpoint distances between the random variables from the two different samples and one-half of the two corresponding sums of distances of the variables within the same sample. The asymptotic null distribution of the test statistic is derived using the projection method and shown to be the limit of the bootstrap distribution. A simulation study includes the comparison of univariate and multivariate normal distributions for location and dispersion alternatives. For normal location alternatives the new test is shown to have power similar to that of the t- and T2-Test.