Two independent random samples were selected from normally distributed populations with means and variances 1m1, s21 2
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Two independent random samples were selected from normally distributed populations with means and variances 1m1, s21 2 and 1m2, s22 2, respectively. The sample sizes, means, and variances are shown in the following table.
*a. Test H0: s1 2 = s2 2 against Ha: s1 2 s2 2 . Use a = .05.
b. Would you be willing to use a t-test to test the null hypothesis H0: 1m1 - m22 = 0 against the alternative hypothesis Ha: 1m1 - m22 0? Why?
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