Change terminology from "active file" to "active dataset".

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

diff --git a/doc/statistics.texi b/doc/statistics.texi
index 93adb65aa158a358ba85e19cb0cde6e2a0c02575..e5e299a47f8a66ae63688581de53a4b57e18d35b 100644 (file)
--- a/doc/statistics.texi
+++ b/doc/statistics.texi
@@ -38,7 +38,7 @@ DESCRIPTIVES
               @{A,D@}
 @end display
 
-The @cmd{DESCRIPTIVES} procedure reads the active file and outputs
+The @cmd{DESCRIPTIVES} procedure reads the active dataset and outputs
 descriptive
 statistics requested by the user.  In addition, it can optionally
 compute Z-scores.
@@ -681,8 +681,11 @@ is used.
 @menu
 * BINOMIAL::                Binomial Test
 * 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
 * SIGN::                    The Sign Test
 * WILCOXON::                Wilcoxon Signed Ranks Test
@@ -766,6 +769,21 @@ If no /EXPECTED subcommand is given, then then equal frequencies
 are expected.
 
 
+@node COCHRAN
+@subsection Cochran Q Test
+@vindex Cochran
+@cindex Cochran Q test
+@cindex Q, Cochran Q
+
+@display
+     [ /COCHRAN = varlist ]
+@end display
+
+The Cochran Q test is used to test for differences between three or more groups.
+The data for @var{varlist} in all cases must assume exactly two distinct values (other than missing values). 
+
+The value of Q will be displayed and its Asymptotic significance based on a chi-square distribution.
+
 @node FRIEDMAN
 @subsection Friedman Test
 @vindex FRIEDMAN
@@ -779,6 +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
@@ -803,6 +838,28 @@ of the test will be printed.
 The abbreviated subcommand  K-W may be used in place of KRUSKAL-WALLIS.
 
 
+@node MANN-WHITNEY
+@subsection Mann-Whitney U Test
+@vindex MANN-WHITNEY
+@vindex M-W
+@cindex Mann-Whitney U test
+@cindex U, Mann-Whitney U
+
+@display
+     [ /MANN-WHITNEY = varlist BY var (group1, group2) ]
+@end display
+
+The Mann-Whitney subcommand is used to test whether two groups of data come from different populations.
+The variables to be tested should be specified in @var{varlist} and the grouping variable, that determines to which group the test variables belong, in @var{var}.
+@var{Var} may be either a string or an alpha variable.
+@var{Group1} and @var{group2} specify the
+two values of @var{var} which determine the groups of the test data.
+Cases for which the @var{var} value is neither @var{group1} or @var{group2} will be ignored.
+
+The value of the Mann-Whitney U statistic, the Wilcoxon W, and the significance will be printed.
+The abbreviated subcommand  M-W may be used in place of MANN-WHITNEY.
+
+
 @node RUNS
 @subsection Runs Test
 @vindex RUNS