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RE: st: margins vs. lincom


From   "Visintainer, Paul" <Paul.Visintainer@baystatehealth.org>
To   "'statalist@hsphsun2.harvard.edu'" <statalist@hsphsun2.harvard.edu>
Subject   RE: st: margins vs. lincom
Date   Thu, 16 Dec 2010 11:33:15 -0500

I suppose the next question is why does -margins- use z?  The default for computations, if I'm not mistaken, is the e(sample).  

-p

________________________________________________
Paul F. Visintainer, PhD
Baystate Medical Center
Springfield, MA 01199


-----Original Message-----
From: owner-statalist@hsphsun2.harvard.edu [mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Weichle, Thomas
Sent: Thursday, December 16, 2010 11:25 AM
To: statalist@hsphsun2.harvard.edu
Subject: RE: st: margins vs. lincom

Since 1.96 has been used so frequently in books and literature,
sometimes I forget that the z-statistic can be more precise using
invnormal(.975).  Thanks for the reminder, Maarten.

Tom Weichle
Math Statistician
Center for Management of Complex Chronic Care (CMC3)
Hines VA Hospital, Bldg 1, C202
708-202-8387 ext. 24261
Thomas.Weichle@va.gov 


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