Question: Refer to Exercise 11. Find the critical value for a 90% confidence interval for the difference 1 2. Exercise 11 A random sample of

Refer to Exercise 11.

Find the critical value for a 90% confidence interval for the difference μ1 − μ2.

Exercise 11

A random sample of 76 residents in a small town had a mean annual income of $$34,214$, with a sample standard deviation of $$2171$. In a neighboring town, a random sample of 88 residents had a mean annual income of $$31,671$ with a sample standard deviation of $$3279$. Let μ1 be the population mean annual income in the first town, and let μ2 be the population mean annual income in the neighboring town. Compute a point estimate for the difference μ1 − μ2.

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