Independent random samples were selected from two normally distributed populations with me...

Independent random samples were selected from two normally distributed populations with means m1 and m2, respectively. The sample sizes, means, and variances are shown in the following table:

a. Test H0: (μ1 – μ2) = 0 against Ha: (μ1 – μ2)> 0. Use α = .05.

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b. Form a 99% confidence interval for (μ1 – μ2).

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c. How large must n1 and n2 be if you wish to estimate (μ1 – μ2)to within two units with 99% confidence? Assume that n1 = n2.