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st: test for independence for variables adding to 100%


From   "Lim, Raymond" <rl2240@columbia.edu>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   st: test for independence for variables adding to 100%
Date   Thu, 14 Apr 2011 12:08:44 -0400

Hello Statalisters,
Say you have teams composed of 3 types of people: elementary schoolers, middle schoolers, high schoolers. How do you test whether teams with a high percentage of high schooler also have a high percentage of elementary schoolers? The tricky part is the three must sum to 100% so having a high percent of one group automatically means having a low percent of the other groups.

Thanks,
-Raymond

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