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.
PSPP can perform descriptive statistics, T-tests, linear regression and non-parametric tests. 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 features of PSPP follows:
Supports over 1 billion cases.
Supports over 1 billion variables.
Syntax and data files are compatible with SPSS.
Choice of terminal or graphical user interface.
Choice of text, postscript or html output formats.
Inter-operates with Gnumeric, OpenOffice.Org and other free software.
Easy data import from spreadsheets, text files and database sources.
Fast statistical procedures, even on very large data sets.
No license fees.
No expiration period.
No unethical “end user license agreements”.
Fully indexed user manual.
Free Software; licensed under GPLv3 or later.
Cross platform; 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.