I am trying to write a reporting system for a project I'm working on that analyzes people's pre and post test scores and does some analysis on it. I have searched to the best of my ability, but cannot find a PHP Class / set of functions that seems to do the analysis I need.
Currently, I am dumping the dataset to a CSV, and one of my co-workers is running it through SPSS to perform a paired-samples t-test (that's the analysis I need run, as we need the p-value).
I know that there is this class in PHP: http://usphp.com/manual/en/ref.stats.php, however, none of that seems to be documented to the point that I can understand it.
I don't mind having to write the analysis myself, but if it already exists, I would like to avoid re-inventing the wheel.
Thanks for any help!