R^2 adjusted

[jimjohn]

can someone plz explain the difference between R^2 and R^2 adjusted. i know its better to use R^2 adjusted, but what makes it better. thx.

[Swank, Paul R]

The adjusted R square is an estimate of the population R squared that
reduces bias due to potential over fitting on the sample used.

Paul R. Swank, Ph.D.
Professor and Director of Research
Children's Learning Institute
University of Texas Health Science Center - Houston


-----Original Message-----
From: SPSSX(r) Discussion [mailto:[hidden email]] On Behalf Of
jimjohn
Sent: Monday, March 24, 2008 2:40 PM
To: [hidden email]
Subject: R^2 adjusted

can someone plz explain the difference between R^2 and R^2 adjusted. i
know
its better to use R^2 adjusted, but what makes it better. thx.
--
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