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December 17, 2014

Homework Help: business statistics

Posted by Heidi on Tuesday, August 4, 2009 at 5:13pm.

For the following independent random samples, use the z-test and the 0.01 level of significance in testing as an approximation to the unequal variances t-test when comparing two sample means?
H0: 1 = 2 versus H1: 1 ≠ 2.
x1 = 33.5 s1 = 6.4 n1 = 31
x2 = 27.6 s2 = 2.7 n2 = 30

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