On monotonicity of the modified likelihood ratio test for the equality of two covariances |
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Authors: | M.S. Srivastava C.G. Khatri E.M. Carter |
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Affiliation: | University of Toronto, Toronto, Canada;Gujarat University, India;University of Guelph Canada |
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Abstract: | For testing the hypothesis of equality of two covariances (Σ1 and Σ2) of two p-dimensional multivariate normal populations, it is shown that the power function of the modified likelihood ratio test increases as λ1 increases from one and λr decreases from one where λ1 > … > λr > 0 are the distinct characteristic roots of Σ1Σ2?1, r ≤ p. As a by-product we get the unbiased result already established by Sugiura and Nagao (1968). |
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Keywords: | 62H15 Monotonicity unbiasedness modified likelihood ratio test equality of covariances |
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