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RE: st: margins vs. lincom


From   Maarten buis <maartenbuis@yahoo.co.uk>
To   statalist@hsphsun2.harvard.edu
Subject   RE: st: margins vs. lincom
Date   Thu, 16 Dec 2010 15:44:40 +0000 (GMT)

--- On Thu, 16/12/10, Weichle, Thomas wrote:
> For the 95% C.I. using the z-distribution, the multiplier
> is 1.96 as we are all familiar.  But using the t-distribution,
> the multiplier is 2.0484071 as produced by Stata's 
> invttail(n, p) function where n is the degrees of freedom and
> p is the probability. 

For the z statistic you can also be more precise than 1.96 using
-invnormal(.975)-

-- Maarten

--------------------------
Maarten L. Buis
Institut fuer Soziologie
Universitaet Tuebingen
Wilhelmstrasse 36
72074 Tuebingen
Germany

http://www.maartenbuis.nl
--------------------------


      

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