According to the General Accounting Office of the U.S. government, the average age of a male federal worker is 43.6 years and that of a male worker in the nonfederal sector is 37.3 years. Is there any difference in the variation of ages of men in the federal sector and men in the nonfederal sector? Suppose a random sample of 15 male federal workers is taken and the variance of their ages is 91.5.Suppose also a random sample of 15 male nonfederal workers is taken and the variance of their ages is 67.3.Use these data and α = .01 to answer the question. Assume ages are normally distributed.
Answer to relevant QuestionsTest the following hypotheses with the data given. Let α = .10.Sample 1 .... Sample 2x̄1 = 138.4 .... x̄2 = 142.5σ1 = 6.71 .... σ2 = 8.92n1 = 48 ..... n2 = 39Use the following data to construct a 99% confidence interval to estimate D. Assume the differences are normally distributed in thepopulation.A study was conducted to compare the salaries of accounting clerks and data entry operators. One of the hypotheses to be tested is that the variability of salaries among accounting clerks is the same as the variability of ...In manufacturing, does worker productivity drop on Friday? In an effort to determine whether it does, a company’s personnel analyst randomly selects from a manufacturing plant five workers who make the same part. He ...A large manufacturing company produces computer printers that are distributed and sold all over the United States. Due to lack of industry information, the company has a difficult time ascertaining its market share in ...
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