High Quality Content by WIKIPEDIA articles! PSPP is a free software application for analysis of sampled data. It has a graphical user interface and conventional command line interface. It is written in C, uses GNU Scientific Library for its mathematical routines, and plotutils for generating graphs. It is intended as a free replacement of the proprietary program SPSS. PSPP can import Gnumeric, OpenDocument and Excel spreadsheets, Postgres databases, comma-separated values- and ASCII-files. It can export files in the SPSS 'portable' and 'system' file formats and to ASCII files. It can perform T-tests, ANOVA, linear regression and a variety of other statistical operations. It also has extensive facilities for recoding, rearranging and manipulating data.

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