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st: RE: testing differences of proportions

From   "Nick Cox" <>
To   <>
Subject   st: RE: testing differences of proportions
Date   Fri, 8 Aug 2003 16:41:35 +0100
> I need to find a test to evaluate whether the difference of 
> proportions by
> groupvar is statistically significant. 
> Specifically, my variable of interest is a 0-1 variable, 1 
> for children that
> died before the age of 1 and 0 otherwise. I want to see if 
> the proportion of
> deaths that i get for the first income quintile of the 
> populations is
> different from the proportion for the 5th quintile.  
> Do you know of any reference on line that i could read for 
> this? And, is
> there a command on STATA that allows me to do this 
> directly? (something
> equivalent to the ttest but for dichotomous variables)

First, -search- lets you search what is built into 
Stata on any topic, given the apparent absence of 
a manual. 

In this case, 

-prtest- ? 
-epitab- ? 

*   For searches and help try:

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