A Robust Test in the Multivariate Two-Sample Location Problem

Ravinder Nath, Benjamin S. Duran

Research output: Contribution to journalArticle

6 Scopus citations

Abstract

A frequently employed test for the equality of two mean vectors is Hotelling's two-sample T2, which assumes multinormality of the populations. When the multinormality assumption is violated, modified versions of T2 and/or nonparametric statistics are utilized. In this paper, it is shown that if Hotelling's T2 statistic is computed as a function of the ranks (instead of the original observations), the resulting statistic is a monotone function of a nonparametric statistic. Just as T2 reduces to the square of a t-statistic in univariate distributions, the rank T2 reduces to a rank transform statistic TR proposed by Conover and Iman (1981). For several bivariate distributions, Monte Carlo results are presented, which suggest robustness of rank T2.

Original languageEnglish (US)
Pages (from-to)225-249
Number of pages25
JournalAmerican Journal of Mathematical and Management Sciences
Volume3
Issue number3
DOIs
StatePublished - Jan 1 1983
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Business, Management and Accounting(all)
  • Applied Mathematics

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