IBM® SPSS® Statistics Version 18.0, formerly called PASW Statistics and most commonly referred to as simply SPSS, is a computer-based data management and inferential statistical analysis program. It is widely used in many fields, such as psychology, sociology, market research, business, and government. SPSS, originally named the Statistical Package for the Social Sciences®, was first developed by graduate students in 1968 to address a growing need for statistical tools that could be performed by computers. SPSS started as a small university-owned tool and quickly became adopted more widely by businesses and government entities. It has since undergone major revisions in software, corporation, and ownership, and it has recently acquired smaller companies, incorporating their products into their line, such as SYSTAT (statistical software), Deltagraph (graphing), and ...

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