Documentation for the Friedman test

[pspp] / doc / statistics.texi

diff --git a/doc/statistics.texi b/doc/statistics.texi
index be696009e4249ddc1f80eded72921e08e4b51502..7e7d9c05eeaa8a300cefd78dc0a549699ffe7b93 100644 (file)
--- a/doc/statistics.texi
+++ b/doc/statistics.texi
@@ -681,8 +681,10 @@ is used.
 @menu
 * BINOMIAL::                Binomial Test
 * CHISQUARE::               Chisquare Test
+* FRIEDMAN::                Friedman Test
 * KRUSKAL-WALLIS::          Kruskal-Wallis Test
 * WILCOXON::                Wilcoxon Signed Ranks Test
+* RUNS::                    Runs Test
 * SIGN::                    The Sign Test
 @end menu
 
@@ -764,9 +766,21 @@ If no /EXPECTED subcommand is given, then then equal frequencies
 are expected.
 
 
+@node FRIEDMAN
+@subsection Friedman Test
+@vindex FRIEDMAN
+@cindex Friedman test
+
+@display
+     [ /FRIEDMAN = varlist ]
+@end display
+
+The Friedman test is used to test for differences between repeated measures when there is no indication that the distributions are normally distributed.
+
+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 KRUSKAL-WALLIS
 @subsection Kruskal-Wallis Test
-@comment  node-name,  next,  previous,  up
 @vindex KRUSKAL-WALLIS
 @vindex K-W
 @cindex Kruskal-Wallis test
@@ -816,6 +830,25 @@ If the @code{WITH} keyword is given, but the
 of variable preceding @code{WITH} against variable following
 @code{WITH} are performed.
 
+@node RUNS
+@subsection Runs Test
+@vindex RUNS
+@cindex runs test
+
+@display 
+     [ /RUNS (@{MEAN, MEDIAN, MODE, value@}) varlist ]
+@end display
+
+The /RUNS subcommand tests whether a data sequence is randomly ordered.
+
+It works by examining the number of times a variable's value crosses a given threshold. 
+The desired threshold must be specified within parentheses.
+It may either be specified as a number or as one of MEAN, MEDIAN or MODE.
+Following the threshold specification comes the list of variables whose values are to be
+tested.
+
+The subcommand shows the number of runs, the asymptotic significance based on the
+length of the data.
 
 @node SIGN
 @subsection Sign Test