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Unformatted text preview: t C. One way ANOVA F test D. Paired difference t test E. F test for equality of population variances AACSB: Reflective Thinking Bloom's: Knowledge Difficulty: Medium Learning Objective: 3 Topic: Signed Rank 1-1808 Chapter 01 - An Introduction to Business Statistics 26. The signed rank test is the nonparametric counterpart of the: A. Small sample t test about a single population mean B. Two independent samples t test C. One way ANOVA F test D. Paired difference t test E. F test for equality of population variances AACSB: Reflective Thinking Bloom's: Knowledge Difficulty: Medium Learning Objective: 3 Topic: Signed rank test 27. Parametric methods are ____________ more powerful than their nonparametric counterparts. A. Always B. Sometimes C. Never AACSB: Reflective Thinking Bloom's: Knowledge Difficulty: Easy Learning Objective: 1 Topic: Nonparametric methods 28. Five years ago, the average starting salary of a new college graduate with a major in marketing was $34,000. A random sample of 10 graduates from this year's graduating class of a local university yielded the following starting salaries in thousands of dollars: 38, 36, 25, 37, 35, 24, 38, 45, 39, and 36. The local university wants to determine if the starting salaries have increased in the last five years. Assume that the population of starting salaries in marketing is not normally distributed. Which one of the following tests is appropriate for this problem? A. Wilcoxon signed rank test B. Wilcoxon rank sum test C. Sign test D. Kruskal-Wallis test E. Mann-Whitney test AACSB: Reflective Thinking Bloom's: Evaluation Difficulty: Medium Learning Objective: 1 Topic: Sign Test 1-1809 Chapter 01 - An Introduction to Business Statistics 29. The EPA has stipulated that the PSI, "Pollution Standard Index" for clean air standards is to be no more than 100 on the average. A random sample of 9 days for the city of Acorn showed PSI readings of 144, 85, 90, 120, 150, 105, 93, 130 and 115. Assume the population of PSI readings is highly non-normal. EPA wants to determine if there is significant evidence to conclude that Acorn's air is dirtier than the stipulated clean air standards. Which one of the following tests is appropriate for this problem? A. Wilcoxon signed rank test B. Wilcoxon rank sum test C. Sign test D. Kruskal-Wallis test E. Spearman's rank correlation test AACSB: Reflective Thinking Bloom's: Evaluation Difficulty: Medium Learning Objective: 1 Topic: Sign Test 30. An e-business/e-commerce information technology consulting company wants to compare the effectiveness of three programming languages that its programmers use. Currently each programming language is used by approximately 1/3 of the programmers employed by the company. The director of the programming division randomly selected 5 programmers from the users of each of the three programming languages and assigned the same simple programming task to each programmer. It is known that all three populations have highly skewed distributions with extreme outliers. Which one of the following nonparametric tests is appropriate for this problem? A. Wilcoxon signed rank test B. Wilcoxon rank sum test C. Sign test D. Kruskal-Wallis test E. Spearman's rank correlation test AACSB: Reflective Thinking Bloom's: Evaluation Difficulty: Medium Learning Objective: 4 Topic: Kruskal-Wallis 1-1810 Chapter 01 - An Introduction to Business Statistics 31. A copy machine service company provides maintenance and repair service for different types and brands of copiers. The manager of the repair department wants to know if the repair time for brand A is higher than the repair time for brand B. The manager randomly selected 8 repair records associated with brand A and 8 repair records associated with brand B. The distribution of repair times for both brand A and brand B is highly skewed. Which one of the following nonparametric tests is appropriate for this problem? A. Wilcoxon signed rank test B. Wilcoxon rank sum test C. Sign test D. Kruskal-Wallis test E. Spearman's rank correlation test AACSB: Reflective Thinking Bloom's: Evaluation Difficulty: Medium Learning Objective: 2 Topic: Rank Sum 32. A cholesterol test was given to 10 heart patients with high cholesterol levels. The same 10 heart patients are then given a new cholesterol-reducing drug for six months. Before the patients begin taking the drug, they are told to maintain their current diets and eating habits so that the effect of the drug can be more effectively determined. After taking the drug for six months, the same patients are given a cholesterol test again. The pharmaceutical company manufacturing the medicine wants to know if the drug is effective in reducing the cholesterol levels of the patients. The cholesterol levels before and after taking the drug is recorded for each patient. Distribution of cholesterol level is not normally distributed. Which one of the following nonparametric tests is appropriate for this problem? A. Wilcoxon signed rank test B. Wilcoxon rank sum...
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