The following information is obtained from two independent samples selected from two normally distributed populations n1 18 1 7 82 1 2 35 n2 15 2 5 99 1 3 17 a What is the point estimate of 1 2 b Construct a 99 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 normally distributed populations. n1 = 18 1 = 7.82 1 = 2.35 n2

The following information is obtained from two independent samples selected from two normally distributed populations.
n1 = 18 1 = 7.82 σ1 = 2.35
n2 = 15 2 = 5.99 σ1 = 3.17
a. What is the point estimate of µ1 – µ2?
b. Construct a 99% confidence interval for µ1 – µ2. Find the margin of error for this estimate.

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