NPAR: Implemented the /KENDALL subcommand.

[pspp-builds.git] / doc / statistics.texi

diff --git a/doc/statistics.texi b/doc/statistics.texi
index 9b4c3ed204cac599b5d6ede2b87c2c822cb291e2..63c97b06078e564dcc0e94cb55cef35b05ee641a 100644 (file)
--- a/doc/statistics.texi
+++ b/doc/statistics.texi
@@ -683,6 +683,7 @@ is used.
 * CHISQUARE::               Chisquare Test
 * COCHRAN::                 Cochran Q Test
 * FRIEDMAN::                Friedman Test
+* KENDALL::                 Kendall's W Test
 * KRUSKAL-WALLIS::          Kruskal-Wallis Test
 * MANN-WHITNEY::            Mann Whitney U Test
 * RUNS::                    Runs Test
@@ -796,6 +797,23 @@ The Friedman test is used to test for differences between repeated measures when
 
 A list of variables which contain the measured data must be given.  The procedure prints the sum of ranks for each variable, the test statistic and its significance.
 
+@node KENDALL
+@subsection Kendall's W Test
+@vindex KENDALL
+@cindex Kendall's W test
+@cindex coefficient of concordance
+
+@display
+     [ /KENDALL = varlist ]
+@end display
+
+The Kendall test investigates whether an arbitrary number of related samples come from the 
+same population.
+It is identical to the Friedman test except that the additional statistic W, Kendall's Coefficient of Concordance is printed.
+It has the range [0,1] --- a value of zero indicates no agreement between the samples whereas a value of
+unity indicates complete agreement.
+
+
 @node KRUSKAL-WALLIS
 @subsection Kruskal-Wallis Test
 @vindex KRUSKAL-WALLIS