Question: The following information was obtained from two independent samples selected from two populations with unknown but equal standard deviations. n1 = 55 1 = 90.740

The following information was obtained from two independent samples selected from two populations with unknown but equal standard deviations.
n1 = 55 1 = 90.740 s1 = 11.60
n2 = 50 2 = 86.30 s1 = 10.25
a. What is the point estimate of µ1 – µ2?
b. Construct a 99% confidence interval for µ1 – µ2.

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