Levene test with large sample

Posted by Salbod on Mar 23, 2007; 11:03pm
URL: http://spssx-discussion.165.s1.nabble.com/Levene-test-with-large-sample-tp1074661.html

Good Evening Everyone,



I hope someone will guide me around this simple problem that fell in front
of me today.



Which t test do I want to report?



I have two groups:



Group1   n= 1,512       M=2.5668           SD1=.80339

Group2   n=    273       M=2.3187           SD2=.96877



Levene's Test for Equality of Variance F= 27.531, p<.0001.



1) Equal Variances Assumed t(1783) = 4.542, p <.001.



2) Equal Variances NOT Assumed t(342.79) = 3.991.





The large N has created a statistically significance difference out of a
trivial difference; furthermore, the variances between the groups are
statistically different.

Can Levene's result be ignored because of the large sample or is it
recommended that I report t test #2?



I would appreciate any suggestions and, if possible, references on this
problem.



I thank you in advance.



Stephen Salbod, Pace University