> Perhaps other stat packages do it differently? Does SPSS manuals detail
> what its t-test procedure does, including which t-test(s) it does and when
> it's appropriate?
SAS documentation, which Marc pointed out, is much more detailed than SPSS. For completeness, here's SPSS's:
username Guest, password Guest (case sensitive): http://support.spss.com/tech/stat/algorithms/algorithms.htm
specifically, for the t-test, see http://support.spss.com/tech/stat/Algorithms/12.0/t_test.pdf
> That might make it easier on users, but I still think the > users should learn the appropriate use of statistical procedures > elsewhere...
Hell, I took my share of stats classes, but it's not like the terminology is always standard, anyway. I much prefer a walked-through example to an abstract explanation like "Calculate pairwise comparisons between group levels with corrections for multiple testing." That seems terse to me. It sorta makes sense only after the fact.
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