Refer to Exercise 11. Find the critical value for a 90% confidence interval for the difference 1
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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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