Question: Two independent random samples of sizes n1 = 4 and n2 = 5 are selected from each of two normal populations: a. Calculate s2, the

Two independent random samples of sizes n1 = 4 and n2 = 5 are selected from each of two normal populations:

a. Calculate s2, the pooled estimator of s2.
b. Find a 90% confidence interval for (µ1 - µ2), the difference between the two population means.
c. Test H0: (µ1 - µ2) = 0 against Ha: (µ1 - µ2)

Population 1 12 3 8 5 Population 2 14 7 7 9 6

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