1-20chapter stats

H0 d1 is shifted to the left of d2 a we reject h0 and

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Unformatted text preview: uming that the sampled population(s) have a particular type of probability distribution. A. Wilcox Rank Sum B. Nonparametric C. Linear regression D. Correlation 50. The __________________ test is a nonparametric counterpart of a small sample t test for comparing two independent population locations. A. Wilcoxon Rank Sum B. Kruskal-Wallis C. Wilcoxon signed rank D. Sign Test 51. The __________________ test is a nonparametric counterpart of a one way ANOVA F test. A. Wilcoxon Rank Sum B. Kruskal-Wallis C. Wilcoxon signed rank D. Sign Test 52. In a Wilcoxon Rank Sum Test, when two or more observations are equal, we assign to each tied observation a rank equal to the ______ of the consecutive ranks. A. average B. median C. sum D. difference 53. The Wilcoxon rank sum test is used to compares the locations of two _____________ populations. A. dependent B. normal C. independent D. similar 1-1776 Chapter 01 - An Introduction to Business Statistics 54. The ______________ test is a nonparametric method that requires data consisting of matched pairs. A. Wilcoxon Rank Sum B. Kruskal-Wallis C. Wilcoxon signed rank D. Sign Test 55. If the population from which we sample is highly skewed to the right or to the left, then the population _________ might be a better measure of central tendency than the population mean. A. median B. variance C. mode D. average 56. When a large sample is taken, _______________ approximation to the binomial distribution can be used to implement the sign test. A. Chi-square B. normal C. correlation coefficient D. Rank sum 57. In order to perform the ________________ test, all of the observations in two samples are combined into a single set and all of the values in the single set are ranked from smallest to largest. A. Wilcoxon Rank Sum B. Kruskal-Wallis C. Wilcoxon signed rank D. Sign Test 1-1777 Chapter 01 - An Introduction to Business Statistics 58. The Kruskal-Wallis H statistic can be approximated by the _____________ distritibution. A. Normal B. Chi-square C. Z D. t 59. In order to perform the ________________ test, all of the observations in p samples are combined into a single set and all of the values in the single set are ranked from smallest to largest. After ranking, sum of the ranks for each of the p samples are calculated. A. Wilcoxon Rank Sum B. Kruskal-Wallis C. Wilcoxon signed rank D. Sign Test 60. Wax-com Electronics Inc. claims that a certain circuit board has a median operating life of less than 20,000 hours. A random sample of 25 such circuit boards showed 8 circuit boards failing before 20,000 hours and 17 circuit boards failing after 20,000 hours. Assume the useful life of the circuit board is not normally distributed and state the null hypothesis. A. H0: Md ≥ 20,000 B. H0: Md ≤ 20,000 C. H0: Md < 20,000 D. H0: Md ≠ 20,000 61. Wax-com Electronics Inc. claims that a certain circuit board has a median operating life of less than 20,000 hours. A random sample of 25 such circuit boards showed 8 circuit boards failing before 20,000 hours and 17 circuit boards failing after 20,000 hours. Assume the useful life of the circuit board is not normally distributed. At α = .05, can it be concluded that the sample contradicts the claim of the company? A. Reject the null hypothesis B. Fail to reject the null hypothesis 1-1778 Chapter 01 - An Introduction to Business Statistics 62. 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. The EPA wants to test to determine if Acorn's air is dirtier than the stipulated clean air standards. Assume the population of PSI readings is highly non-normal and state the null hypothesis. A. H0: Md ≥ 100 B. H0: Md ≤ 100 C. H0: Md ≠ 100 D. H0: Md > 100 63. 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. Is there significant evidence to conclude that Acorn's air is dirtier than the stipulated clean air standards? Test at α = .05. A. Reject the null hypothesis B. Fail to reject the null hypothesis 64. 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. The test is conducted at α = .05 and the p-value is found to be .254. Based on this result, provide a one sentence managerial conclusion. A. Acorn's air is dirtier than the EPA stipulated clean air standards. B. Cannot conclude that Acorn's air is dirt...
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This document was uploaded on 01/20/2014.

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