GNU PSPP is a program for statistical analysis of sampled data. It is a Free replacement for the proprietary program SPSS, and appears very similar to it with a few exceptions.
The most important of these exceptions are, that there are no “time bombs”; your copy of PSPP will not “expire” or deliberately stop working in the future. Neither are there any artificial limits on the number of cases or variables which you can use. There are no additional packages to purchase in order to get “advanced” functions; all functionality that PSPP currently supports is in the core package.
PSPP is a stable and reliable application. It can perform descriptive statistics, T-tests, anova, linear and logistic regression, measures of association, cluster analysis, reliability and factor analysis, non-parametric tests and more. Its backend is designed to perform its analyses as fast as possible, regardless of the size of the input data. You can use PSPP with its graphical interface or the more traditional syntax commands.
A brief list of some of the PSPP's features follows below. We also made available a page with screenshots and sample output. PSPP has:
PSPP is particularly aimed at statisticians, social scientists and students requiring fast convenient analysis of sampled data.
As with most GNU software, PSPP can be found on the main GNU ftp server: http://ftp.gnu.org/gnu/pspp/ (via HTTP) and ftp://ftp.gnu.org/gnu/pspp/ (via FTP). It can also be found on the GNU mirrors; please use a mirror if possible.
There are some additional ways you can download or otherwise obtain PSPP.
Documentation for PSPP is available online, as is documentation for most GNU software. You may also find more information about PSPP by running info pspp or man pspp, or by looking at /usr/share/doc/pspp/, /usr/local/doc/pspp/, or similar directories on your system. A brief summary is available by running pspp --help.
For further information, please browse our list of frequently asked questions to see if your issue is mentioned there. If it is not, you might also want to peruse the archives of our mailing list, pspp-users; the issue may have been discussed there. Failing that, you are welcome to subscribe to the list, and send a question of your own.
Development of PSPP and GNU in general, is a volunteer effort, and you can contribute. For information, please read How to help GNU. If you'd like to get involved, it's a good idea to join the discussion mailing list (see above).
PSPP is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version.
The Free Software Foundation is the principal organizational sponsor of the GNU Operating System. Support GNU and the FSF by buying manuals and gear, joining the FSF as an associate member, or making a donation, either directly to the FSF or via Flattr.