: You're running into a historical artifact: in pre-computer days, using the
: normal distribution rather than the t distribution reduced the size of the
: tables you had to work with. Nowadays, a computer can compute a t
: probability just as easily as a z probability, so unless you're in the
: rare situation Karl mentioned, there's no reason not to use a t test.
Yet the old ways are still actively taught, even when classroom
instruction assumes the use of computers.
Dave
MBA student
Otterbein College
--
Dave Firth [EMAIL PROTECTED] http://www.geocities.com/djfirth/
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