Issue: Vol 40 No 2 (2006)

Volume 40 Number 2, 2006

A new alternative in testing for homogeneity of variances

A new alternative procedure is proposed for testing the hypothesis that the variances
of k independent groups are equal under non-normality. Extensive simulations
indicated that the new procedure always gave the experimenter more
control over the probability of a Type I error than do the Bartlett \chi^2
and Levene’s tests. The same statement was true for unequal sample sizes. Overall, the
new procedure was more powerful than the other procedures tested, especially
when the variance ratios were high.

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