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st: RE: Diagnostic Plot for distribution of variable z


From   "Nick Cox" <n.j.cox@durham.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: Diagnostic Plot for distribution of variable z
Date   Mon, 6 Jun 2005 15:57:46 +0100

There are various possibilities here. -skewplot- 
from SSC is another. There was some discussion 
in Stata Journal 4(1) 2004. 

Real outliers show up almost regardless of which 
form of plot you choose. 

Nick 
n.j.cox@durham.ac.uk 

delhawary@worldbank.org

> I am trying to find a way to examine the distribution of  
> variable z to see if
> it is negatively or positively skewed. I would like to know 
> what would be the
> command for that. My main objective is to identify outliers 
> in the data set.
> 
> I already tried the command: symplot z (under diagnostic 
> plots). But I am not
> sure if this is the correct one or not. In this plot, the x 
> axis is labelled
> distance below median while the y axis is labeled distance 
> above median.
> 

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