Homogeneity of Variance
William R. Veitch, Roscoe John T. · The Journal of Experimental Education · 1974
A Monte Carlo technique was employed in order to compare the relative power and robustness of the Bartlett, Cochran, Hartley, and Levene tests for homogeniety of variance. The Cochran test proved to be the most robust and powerful procedure when sampling from normal, leptokurtic, and skewed distributions; while the Levene test proved most useful with uniform data. The Cochran test was successfully adapted for use with samples of unequal size by utilizing the harmonic mean of the sample sizes for obtaining tabled critical values.