business statistics
posted by Heidi .
For the following independent random samples, use the ztest and the 0.01 level of significance in testing as an approximation to the unequal variances ttest when comparing two sample means?
H0: µ1 = µ2 versus H1: µ1 ≠ µ2.
x¯1 = 33.5 s1 = 6.4 n1 = 31
x¯2 = 27.6 s2 = 2.7 n2 = 30
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