Reference no: EM131008039
1. Foreclosure rates. Home foreclosures were up 47% in March 2008 compared to the previous year (realestate.msn.com; April 2008). The data show home foreclosure rates (as % change from the previous year) for a sample of cities in two regions of the United States, the Northeast and the Southwest.
2. Baseball 2006. American League baseball teams play their games with the designated hitter rule, meaning that pitchers do not bat. The league believes that replacing the pitcher, traditionally a weak hitter, with another player in the batting order produces more runs and generates more interest among fans. Below are the average numbers of runs scored (per game by both teams) in American League and National League stadiums for the 2006 season.
Northeast: 2.99,- 2.36, 3.03, 1.01, 5.77, 9.95, - 3.52, 7.16, - 3.34, 4.75, 5.25, 6.21, 1.67, - 2.45, 4.50, 1.87, - 2.15, - 0.75 - 0.55, 3.45,
Southwest: 10.15, 23.05, 18.95, 21.16, 17.45, 12.67, 13.75, 29.42, 11.45, 16.77, 12.67, 13.69, 25.81, 21.16, 19.67, 11.88, 13.67, 18.00, 12.88
a) Write the null and alternative hypotheses.
b) Check the conditions for a Wilcoxon rank-sum (or Mann-Whitney) test.
c) Complete the test and report your conclusion.
d) Make histograms of each group. Discuss whether you would choose a nonparametric test for these data or a two-sample t-test (as in Chapter 14 Exercise 36.)
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Analyze the qi goals the organization has in place
: Analyze publically available quality measures affecting health care organizations. Analyze the types of care or service your chosen organization focus on. Analyze the mission. Analyze the QI goals the organization has in place
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Explain why the con?dence interval for the mean value of y
: Explain why the con?dence interval for the mean value of y for a particular x-value, say, xp, gets wider the farther xp is from x¯. What are the implications of this phenomenon for estimation and prediction?
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Explain how a market can be segmented
: Explain and provide an example of credence - Explain how a market can be segmented. What are types of segments that a marketing manager could segment a market? Provide an example of segmenting a market for a pet product or service.
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Explain the pros and cons of using simulation modeling
: Under what conditions would you choose to use a simulation model? What is the simulation process? Explain the pros and cons of using simulation modeling
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Conditions for a wilcoxon rank-sum
: a) Write the null and alternative hypotheses. b) Check the conditions for a Wilcoxon rank-sum (or Mann-Whitney) test. c) Complete the test and report your conclusion.
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Create a chart showing the costs of your product or service
: create a chart showing the costs of your product or service and at least three different price points you might consider selling the product.
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Recent criticism of sugar content of children cereals
: Cereal sugar. A food company is concerned about recent criticism of the sugar content of their children's cereals. The data show the sugar content (as a percentage of weight) of several national brands of children's and adults' cereals. Are childr..
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What is the maximum concentration of the antibiotic
: After an antibiotic tablet is taken, the concentration of the antibiotic in the bloodstream is modeled. What is the maximum concentration of the antibiotic during the first 12 hours?
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When preparing the statement of cash flows
: When preparing the statement of cash flows, companies are required to report separately as operating cash flows all of the following except a. interest received on investments in bonds. b. interest paid on the company's bonds. c. cash collected from ..
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