The following information is obtained from two independent samples selected from two populations n1 650 1 1 05 1 5 22 n2 675 2 1 54 1 6 80 a What is the point estimate of 1 2 b Construct a 95 confidence interval for 1 2 Find the margin of error for this estimate

Question: The following information is obtained from two independent samples selected from two populations. n1 = 650 1 = 1.05 1 = 5.22 n2 = 675

The following information is obtained from two independent samples selected from two populations.
n1 = 650 1 = 1.05 σ1 = 5.22
n2 = 675 2 = 1.54 σ1 = 6.80
a. What is the point estimate of µ1 – µ2?
b. Construct a 95% confidence interval for µ1 – µ2. Find the margin of error for this estimate.

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