1 /* PSPP - computes sample statistics.
2 Copyright (C) 2004 Free Software Foundation, Inc.
3 Written by John Darrington <john@darrington.wattle.id.au>
5 This program is free software; you can redistribute it and/or
6 modify it under the terms of the GNU General Public License as
7 published by the Free Software Foundation; either version 2 of the
8 License, or (at your option) any later version.
10 This program is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
35 /* Statistics for grouped data */
36 struct group_statistics
38 /* The value of the independent variable for this group */
41 /* The criterium matching for comparing with id */
42 enum comparison criterion;
44 /* The arithmetic mean */
47 /* Population std. deviation */
50 /* Sample std. deviation */
64 /* Sum of differences */
67 /* Mean of differences */
70 /* Running total of the Levene for this group */
73 /* Group mean of Levene */
79 /* T-TEST private data */
82 /* Stats for the `universal group' */
83 struct group_statistics ugs;
85 /* Number of groups */
88 /* Stats for individual groups */
89 struct group_statistics *gs;
91 /* The levene statistic */