GNU PSPP

GNU PSPP is a program for the 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 PSPP's features.

Support for over 1 billion cases

Support for over 1 billion variables

Syntax and data files which are compatible with those of SPSS

A choice of terminal or graphical user interface

A choice of text, postscript, pdf, opendocument, html or TeX output formats

Inter-operability with: LibreOffice, Apache OpenOffice, Gnumeric and other free software

Easy data import from spreadsheets, text files and database sources

The capability to open, analyse and edit two or more datasets concurrently

A user interface supporting all common character sets

The user interface has been translated to multiple languages

Very fast statistical procedures, even on very large data sets

No license fees and no expiration period

No unethical “end user license agreements”

A fully indexed user manual

Freedom ensured; It is licensed under the GPLv3 or later

Portability; Runs on many different computers and many different operating systems

PSPP is particularly aimed at statisticians, social scientists and students requiring fast convenient analysis of sampled data.