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Date:   Wed, 23 Dec 2009 09:54:52 -0500
Reply-To:   Jeff <zhujp98@GMAIL.COM>
Sender:   "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From:   Jeff <zhujp98@GMAIL.COM>
Subject:   how to test the signicanace
Content-Type:   text/plain; charset=ISO-8859-1

Two group of people. all people in G1 is in a health plan, and these in G2 is not G1 have x1 member, and y1 hospital admits. hospital admit rate is hr1=y1/x1 G2 has x2 member and y1 hospital admits. hospital admit rate is h21=y2/x2

I want to test if there is significant difference between G1 and G2. What kind test should I use?

Thanks. JP

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