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A personnel director in a particular state claims that the mean annual income is greater in...

A personnel director in a particular state claims that the mean annual income is greater in one of the​ state's counties​ (county A) than it is in another county​ (county B). In County​ A, a random sample of 1818 residents has a mean annual income of $ 40 comma 800$40,800 and a standard deviation of $ 8500$8500. In County​ B, a random sample of 88 residents has a mean annual income of $ 37 comma 700$37,700 and a standard deviation of $ 5500$5500. At alphaαequals=0.100.10​, answer parts​ (a) through​ (e). Assume the population variances are not equal. If​ convenient, use technology to solve the problem.

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milcah answered 1 year ago
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