The practical meaning of statistical significance has been discussed
in several recent threads. Interested readers should look at threads
'Tests of "significance"',
beginning Mon, 7 Apr 2008 16:08:40 -1000 (some 30 postings);
'comparing groups before and after treatment',
beginning Wed, 21 May 2008 00:27:44 +0100;
'Statistical significance Vs Meaningfulness',
beginning Thu, 22 May 2008 08:52:45 -0700.
A related thread is
'Effect size in spss',
beginning Thu, 22 May 2008 19:23:28 -0700.
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