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st: RE: Probit Plot Analysis


From   "Nick Cox" <n.j.cox@durham.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: Probit Plot Analysis
Date   Thu, 3 Apr 2003 17:36:14 +0100

Andrea Baccarelli
> 
> I need to reproduce an analysis published by Toide et al. 
> in Cancer Epid 
> Biom Prev 2003, 12: 219-222.
> 
> The analysis is mentioned in the paper as "Probit plot analysis".
> It is a simple graphical univariate analysis. It is a 
> graph, with "probit" 
> on the X-axis and a continuos variable of interest on the Y-axis.
> I do not understand whether this is a standard way of 
> displaying data. The 
> values on the Y-axis always increase with increasing values 
> on the X-axis 
> (It looks like a cumulative distribution graph).
> 
> Does anybody know how to reproduce this graph in Stata?

Probit plotting is one name given to what -qnorm- 
does. See the Stata 8 manuals, [R] diagnostic 
plots, especially the section on p.266. Alternatively, 
see Rupert G. Miller, Beyond ANOVA (reissued by 
Chapman and Hall, 1997). 

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