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Re: st: Difference of means and t-test
From
Michael McCulloch <[email protected]>
To
[email protected]
Subject
Re: st: Difference of means and t-test
Date
Sat, 12 Jun 2010 14:45:19 -0700
One way to do this could be compare 1 to 2, then 2 to 3, then 1 to 3,
followed by the Bonferroni adjustment for multiple comparisons.
On Jun 12, 2010, at 2:41 PM, [email protected] wrote:
Dear Statalist,
I am working with three different samples.
When I deal with two of them, I can calculate the difference of
means and
t-test by doing:
ttesti obs1 mean1 std1 obs2 mean2 std2, unequal
As I have three groups, I am also interested in testing the null:
mean1 =
mean2 = mean3 , under the alternative that at least one mean is
different.
Could you please give me some advice?
Thanks in advance.
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Best wishes,
Michael McCulloch, LAc MPH PhD
Pine Street Foundation
124 Pine Street
San Anselmo, CA 94960-2674
tel: 415-407-1357
fax: 206-338-2391
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