Posted by **Student** on Tuesday, August 12, 2008 at 12:34pm.

If we are testing for the difference between the means of 2 independent populations presumes equal variances with samples of n1 = 20 and n2 = 20, the number of degrees of freedom is equal to

a) 39

b) 38

c) 19

d) 18.

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**chris**, Wednesday, January 25, 2012 at 5:15pm
38 dof

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