Fixed misleading results in the Kruskal-Wallis test

[pspp] / doc / statistics.texi

diff --git a/doc/statistics.texi b/doc/statistics.texi
index 2f74f883fd1e7dda67622f7a9634abcf78d8677f..01976e27c950fa4ef21087dc40e0fadbd668a3ee 100644 (file)
--- a/doc/statistics.texi
+++ b/doc/statistics.texi
@@ -1634,9 +1634,10 @@ arbitrary number of populations.  It does not assume normality.
 The data to be compared are specified by @var{var_list}.
 The categorical variable determining the groups to which the
 data belongs is given by @var{var}. The limits @var{lower} and
-@var{upper} specify the valid range of @var{var}. Any cases for
-which @var{var} falls outside [@var{lower}, @var{upper}] are
-ignored.
+@var{upper} specify the valid range of @var{var}.
+If @var{upper} is smaller than @var{lower}, the PSPP will assume their values
+to be reversed. Any cases for which @var{var} falls outside
+[@var{lower}, @var{upper}] are ignored.
 
 The mean rank of each group as well as the chi-squared value and
 significance of the test are printed.