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help for ^levene^
by Herve M. CACI, April 2004
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Levene's T-test for equality of variances (multiple samples) ------------------------------------------------------------

^levene^ varname [^if^ exp][^in^ range], by(groupvar)

Description -----------

Levene's T-test is used to test the null hypothesis that multiple population variances (corresponding to multiple samples) are equal.

The test is a one-way ANOVA on absolute deviations for each group.

Options -------

Note that the by(groupvar) "option" is not optional.

Also see --------

Manual: ^[R] oneway^ ^[R] anova^ On-line: help for @oneway@, @anova@