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SME_8e_Ch_19_Section_2

# SME_8e_Ch_19_Section_2 - CHAPTER 19 SECTION 2 NONPARAMETRIC...

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1 CHAPTER 19 SECTION 2: NONPARAMETRIC STATISTICS MULTIPLE CHOICE 38. A nonparametric test for comparing two or more populations should be used instead of its parametric counterpart if: a. the sample sizes are large. b. the populations have equal means. c. the populations are normally distributed. d. no information about the shape of the populations is available. ANS: D PTS: 1 REF: SECTION 19.2 39. The Wilcoxon signed rank sum test statistic is approximately normally distributed whenever the sample sizes are larger than: a. 5 b. 10 c. 30 d. None of these choices. ANS: C PTS: 1 REF: SECTION 19.2 40. The sign test statistic has what kind of distribution? a. normal b. binomial c. nonparametric d. None of these choices. ANS: B PTS: 1 REF: SECTION 19.2 41. The sign test statistic is approximately normally distributed whenever the sample sizes are larger than: a. 5 b. 10 c. 30 d. None of these choices. ANS: B PTS: 1 REF: SECTION 19.2 42. A nonparametric method to compare two populations, when the samples are matched pairs and the data are ordinal, is the: a. Wilcoxon signed rank sum test. b. sign test. c. Wilcoxon rank sum test. d. matched pairs t -test. ANS: B PTS: 1 REF: SECTION 19.2

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2 43. The nonparametric counterpart of the parametric t -test of μ D for matched pairs is the: a. Friedman test. b. Kruskal-Wallis test. c. Wilcoxon signed rank sum test. d. Wilcoxon rank sum test. ANS: C PTS: 1 REF: SECTION 19.2 44. A nonparametric method to compare two populations, when the samples are matched pairs and the data are interval, and where the normality requirement necessary to perform the parametric test is unsatisfied, is the: a. Wilcoxon rank sum test. b. sign test. c. matched pairs t -test. d. Wilcoxon signed rank sum test. ANS: D PTS: 1 REF: SECTION 19.2 45. When the data are interval, how does the Wilcoxon signed rank sum test compare to the sign test? a. Wilcoxon uses the information in the data more effectively. b. Wilcoxon uses the information in the data less effectively. c. Cannot compare the two tests without knowing the sample size. d. None of these choices. ANS: A PTS: 1 REF: SECTION 19.2 46. Which of the following correctly describes the sign test? a. It often uses the directions of differences observed in matched-pairs sample to determine whether the relative frequency distributions of two statistical populations are identical to or different from one another. b. It is often used to determine whether a sample comes from a population with a specified median. c.
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SME_8e_Ch_19_Section_2 - CHAPTER 19 SECTION 2 NONPARAMETRIC...

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