Null distribution of the sum of squared z-transforms in testing complete independence |
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Authors: | Shande Chen Govind S Mudholkar |
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Institution: | (1) Department of Statistics, University of Rochester, 14627 Rochester, NY, U.S.A. |
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Abstract: | Brien et al. (1984, Biometrika, 71, 545–554; 1988, Biometrika, 75, 469–476) have proposed, illustrated and discussed advantages of using Fisher's z-transforms for analyzing correlation structures of multinormal data. Chen and Mudholkar (1988, Austral. J. Statist., 31, 105–110) have studied the sum of squared z-transforms of sample correlations as a test statistic for complete independence. In this paper Brown's (1987, Ann. Probab., 15, 416–422) graph-theoretic characterization of the dependence structure of sample correlations is used to evaluate moments of the test statistic. These moments are then used to approximate its null distribution accurately over a broad range of parameters, including the case where the population dimension exceeds the sample size. |
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Keywords: | Approximation correlation analysis dependence among sample correlations |
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