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An Empirical Comparison of the Z-Variance and Box-Scheffé Tests for Homogeneity of Variance

Published online by Cambridge University Press:  01 January 2025

Kenneth J. Levy
Kenneth J. Levy*
Affiliation:
State University of New York at Buffalo
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Abstract

This brief report provides a comparison of the Z-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. The Z-variance test is not robust against non-normality; the Box-Scheffé test is robust against non-normality but is not nearly as powerful as the Z-variance test.

Type
Original Paper
Information
Psychometrika , Volume 40 , Issue 4 , December 1975 , pp. 519 - 524
Copyright
Copyright © 1975 The Psychometric Society

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