On 12/08/2008, at 3:11 AM, Angelo Scozzarella wrote:
How can I make a t-test if I haven't got all data set but I know
the numbers
of subjects for each group, the mean and di standard deviation for
each group?
Use your head. I.e. do the same thing you'd do if you weren't using
a computer,
but get R to do the arithmetic for you.
cheers,
Rolf Turner
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