Date:         Sun, 16 May 2004 05:11:18 GMT
Reply-To:     Arthur Tabachneck <art297@NETSCAPE.NET>
Sender:       "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From:         Arthur Tabachneck <art297@NETSCAPE.NET>
Subject:      Re: One-tailed T-Test

DG,

If you use proc ttest then, according to the manual:

Pr > |t|, the probability of a greater absolute value of t under the null
hypothesis. This is the two-tailed significance probability. For a
one-tailed test, halve this probability.

Art
--------
"DG" <digupta1@vt.edu> wrote in message
news:c86ig3$e16$1@solaris.cc.vt.edu...
> How can I do a one-tailed paired t-test using SAS? I have used the
following
> code which I think is for two-tailed tests. Completion and accuracy are my
> dependent variables. I have inputed the difference scores of the two
groups
> that I want to compare.
>