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# RE: st: qnorm

 From amir gahremanpour To statalist Subject RE: st: qnorm Date Sun, 4 Mar 2012 21:26:11 -0600

Nick,

In one of my lectures about distributions, I was taught that in QQ-plot all points should be within z=+/-2 !, If we have such a definition we should be able
to calculate p-value for QQ plot, right? visual assessment of qqplot is very subjective !

Is that possible to create QQ plot in stata for multivariate normality  (like in R), for example using "mvtest normality" (default is dhansen test).

thanks so much

Amir

> Date: Sun, 4 Mar 2012 08:36:04 +0000
> Subject: Re: st: qnorm
> From: njcoxstata@gmail.com
> To: statalist@hsphsun2.harvard.edu
>
> -qnorm- is just a graphical comparison; there is no associated
> P-value. There are various tests for more formal comparisons. If only
> allowed -qnorm- or a test, I would always choose -qnorm-.
>
> Which multivariate normality test and what kind of graph do you have in mind?
>
> Nick
>
> On Sun, Mar 4, 2012 at 3:45 AM, amir gahremanpour <gamirali@hotmail.com> wrote:
>
> > I appreciate it if someone can teach me how to get p-value for qnorm and how to generate graph for multivariate normality test.
> *
> * For searches and help try:
> * http://www.stata.com/help.cgi?search
> * http://www.stata.com/support/statalist/faq
> * http://www.ats.ucla.edu/stat/stata/

*
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• References:
• st: qnorm
• From: amir gahremanpour <gamirali@hotmail.com>
• Re: st: qnorm
• From: Nick Cox <njcoxstata@gmail.com>