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st: finding a mean with empty obs cells


From   "Jeff NASTERNAK" <jnasternak2703@msn.com>
To   statalist@hsphsun2.harvard.edu
Subject   st: finding a mean with empty obs cells
Date   Tue, 06 Sep 2005 13:56:13 -0700

Hello
I have a data set that has up to 30 observations for one ID. All the IDs go up to 30 observations but most have between 10 to 15 observations. When I try to find the mean, how do I not take into account the empty cells for a particular ID?

thanks
Jeff


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