I want to do a few basic statistics (mean and stdev) and since I have lots of data I figured I would do it with Perl (using the
module). However, I notice some quite interesting discrepancies as opposed to if I calculated the same values using Excel's formulas. Particularly I think the stdev is a problem, since in one test run I did, I got 0.401 with Excel and 0.41 with the Perl module, which does affect my calculations later on.