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Re: st: one-sided or two? spearman, regress
--- Yoshiro Nagao <[email protected]> wrote:
> Is the "p" value generated by
> "spearman" one-sides, or two-sided?
>
> Similarly, how about the "p" value
> for each regression coefficient (i.e. slope)
> after "regress"? I suppose this
> should be two-sided...
The p-value in both cases is twosided, they test the Null hypothesis
that the correlation or regression coefficient equeals zero, versus the
alternative hypothesis that the correlation or regression coefficient
is not zero.
If you want to perform a one sided test you can look at:
http://www.stata.com/support/faqs/stat/oneside.html
Hope this helps,
Maarten
-----------------------------------------
Maarten L. Buis
Department of Social Research Methodology
Vrije Universiteit Amsterdam
Boelelaan 1081
1081 HV Amsterdam
The Netherlands
visiting address:
Buitenveldertselaan 3 (Metropolitan), room Z434
+31 20 5986715
http://home.fsw.vu.nl/m.buis/
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