Date: Fri, 3 Mar 2000 10:25:12 -0500
Reply-To: "William B. Ware" <wbware@EMAIL.UNC.EDU>
Sender: "SPSSX(r) Discussion" <SPSSX-L@LISTSERV.UGA.EDU>
From: "William B. Ware" <wbware@EMAIL.UNC.EDU>
Subject: Re: one-tailed t-test
In-Reply-To: <001a01bf848a$3a4336e0$2dff173f@oemcomputer>
Content-Type: TEXT/PLAIN; charset=US-ASCII
On Thu, 2 Mar 2000, jnkclark wrote:
> Does anyone know how to get SPSS 8.0 to run a one-tailed two
> -sample(independent) t-test? I can't get it out of the default
> two-tailed analysis. If it involves using syntax then I could really
> use some detailed instructions as I have never used syntax. Any
> feedback would be enormously appreciated.
>
> Desperate Ph.D. Candidate,
> Keri Clark
Keri,
Perhaps I oversimplify the issue... but why can't you "allow" SPSS to do
the two-tailed test, but change the way that you look at the
results...? For example, suppose you run the t-test and SPSS returns a
p-value of .082. That means there is .041 in each of the tails... If the
direction of the observed difference is consistent with with your
alternate hypothesis, then you can reject, p < .05.
WBW
__________________________________________________________________________
William B. Ware, Professor and Chair Educational Psychology,
CB# 3500 Measurement, and Evaluation
University of North Carolina PHONE (919)-962-7848
Chapel Hill, NC 27599-3500 FAX: (919)-962-1533
http://www.unc.edu/~wbware/ EMAIL: wbware@unc.edu
__________________________________________________________________________
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