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Invariant scale matrix hypothesis tests under elliptical symmetry

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  • Chmielewski, M. A.

Abstract

The usual assumption in multivariate hypothesis testing is that the sample consists of n independent, identically distributed Gaussian m-vectors. In this paper this assumption is weakened by considering a class of distributions for which the vector observations are not necessarily either Gaussian or independent. This class contains the elliptically symmetric laws with densities of the form f(X(n - m)) = [psi][tr(X - M)' (X - M)[Sigma]-1]. For testing the equality of k scale matrices and for the sphericity hypothesis it is shown, by using the structure of the underlying distribution rather than any specific form of the density, that the usual invariant normal-theory tests are exactly robust, for both the null and non-null cases, under this wider class.

Suggested Citation

  • Chmielewski, M. A., 1980. "Invariant scale matrix hypothesis tests under elliptical symmetry," Journal of Multivariate Analysis, Elsevier, vol. 10(3), pages 343-350, September.
    • Handle: RePEc:eee:jmvana:v:10:y:1980:i:3:p:343-350
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