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Mathematics, 15.04.2020 21:37 noslengerman
A personnel director in a particular state claims that the mean annual income is the same in one of the state's counties (County A) as it is in another county (County B). In County A, a random sample of 18 residents has a mean annual income of $ 40 comma 400 and a standard deviation of $ 8700. In County B, a random sample of 8 residents has a mean annual income of $ 39 comma 200 and a standard deviation of $ 6000. At alphaequals0.10, answer parts (a) through (e). Assume the population variances are not equal. Assume the samples are random and independent, and the populations are normally distributed.
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