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[ /KRUSKAL-WALLIS =var_listBY var (lower,upper) ]

The Kruskal-Wallis test is used to compare data from an
arbitrary number of populations. It does not assume normality.
The data to be compared are specified by `var_list`.
The categorical variable determining the groups to which the
data belongs is given by `var`. The limits `lower` and
`upper` specify the valid range of `var`. Any cases for
which `var` falls outside [`lower`, `upper`] will be
ignored.

The mean rank of each group as well as the chi-squared value and significance
of the test will be printed.
The abbreviated subcommand `K-W`

may be used in place of `KRUSKAL-WALLIS`

.