An empirical comparison of theZ-variance and Box-Scheffé tests for homogeneity of variance
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This brief report provides a comparison of theZ-variance and Box-Scheffé tests for homogeneity of variance. Both procedures are relatively simple to perform and both may be readily utilized in complex, multifactor designs. TheZ-variance test is not robust against non-normality; the Box-Scheffé test is robust against non-normality but is not nearly as powerful as theZ-variance test.
KeywordsPublic Policy Statistical Theory Empirical Comparison Multifactor Design
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