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The following information is obtained from two independent samples selected

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.

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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