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Message-ID: <317737de0911290747p6dcc0a2ar1344ee4c185be34@mail.gmail.com>
Date: 2009-11-29T15:47:46Z
From: Jorge Ivan Velez
Subject: How to z-standardize for subgroups?
In-Reply-To: <8196661B-256A-4E87-8296-D245E717DDE8@uni-bremen.de>

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