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st: "dependent correlation" or c-statistics


From   Melaku Fekadu <melaku.fekadu@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   st: "dependent correlation" or c-statistics
Date   Wed, 18 Aug 2010 14:34:10 +0300

hello statalisters,

i have two variables: one called 'ves' with values between 1 to 10,
and the other is dichotomus called 'frality' with value either 0 or 1.

i create a categorical variable from 'ves' 0-2 and 3-10 and make a
chi-square test to test a relation with the variable frality, and i
get p>0.05. But when i create another categorical variable of 'ves'
with 0-4 and 5-10 and do the chi-square test i find that p<0.05.

my question: what can i do to get a threshold value of 'ves' where
p-value will be 0.05? somebody told me about a procedure calles
"dependent correlation" or c-statistics in stata.

any help will be appreciated.

thanks
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