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st: Re: Re: ST: one-tailed test


From   "Levy Lee" <chtl@econ.hku.hk>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: Re: Re: ST: one-tailed test
Date   Mon, 11 Oct 2004 21:09:24 +0800

thanks again, 

but i do not think this is precise, are there other way to go?

thanks 

Levy Lee

----- Original Message ----- 
From: "Eric Uslaner" <euslaner@gvpt.umd.edu>
To: <statalist@hsphsun2.harvard.edu>
Sent: Monday, October 11, 2004 8:57 PM
Subject: st: Re: ST: one-tailed test


> Levy Lee asks how to perform a one-tailed test after a regression and
> Richard Williams responds: "ust look at the printout, and see (a) is 
> the coefficient for x2 positive, and (b) is it significant at the .10
> level  (or double whatever alpha level it is you want to chose).  You
> don't need 
> to do any additional analyses, the information you need is already
> there."
> 
> Well, not quite.  Stata (annoyingly) always reports 2-tailed tests,
> whereas one-tailed tests are clearly more appropriate.  So you need to
> divide the p level by 2.
> 
> 
> 
> Ric Uslaner
> Department of Government and Politics
> University of Maryland
> College Park, MD 20742
> office phone: 301-405-4151
> home phone 301-279-0414
> office fax: 301-314-9690
> home fax: 301-279-2614
> e-mail: euslaner@gvpt.umd.edu
> home page: http://www.bsos.umd.edu/gvpt/uslaner
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