Paul Bernhardt wrote:
> Now, if we can only get over the arbitrariness of the n<30 cut-off for
> use of t vs z and teach: use z when you know sigma and t when you don't.
> (Triola, as much as I like some of its choices, still retains this) <sigh>
How about (at least for social & health sciences): use t when you don't
know sigma, and speak to a statistician when you think you do?
-Robert Dawson
.
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