Question
In: Statistics and Probability
A personnel director in a particular state claims that the mean annual income is the same...
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 15 residents has a mean annual income of $ 40 comma 800 and a standard deviation of $ 8800. In County B, a random sample of 9 residents has a mean annual income of $ 38 comma 100 and a standard deviation of $ 5500. At alphaequals0.01, 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. (b) Find the critical value(s) and identify the rejection region(s). (c) Find the standardized test statistic. (d) Decide whether to reject or fail to reject the null hypothesis. (e) Interpret the decision in the context of the original claim.
Solutions
Expert Solution
Conclusion : There is not sufficient
evidence to warrant the rejection of the claim 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).
orchestra answered 1 year agoRelated Solutions
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A personnel director in a particular state claims that the mean
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A personnel director in a particular state claims that the mean annual income is greater in...
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Annual income: The mean annual income for people in a certain city (in thousands of dollars)...
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alpha=
Hypothesis (use words if needed)
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