Question: The following information was obtained from two independent samples selected from two normally distributed populations with unknown but equal standard deviations. n1 = 21 1

The following information was obtained from two independent samples selected from two normally distributed populations with unknown but equal standard deviations.
n1 = 21 1 = 13.97 s1 = 3.78
n2 = 20 2 = 15.55 s1 = 3.26
a. What is the point estimate of µ1 – µ2?
b. Construct a 95% confidence interval for µ1 – µ2.

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