SME_8e_Ch_19_Section_1 - CHAPTER 19 SECTION 1:...

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1 CHAPTER 19 SECTION 1: NONPARAMETRIC STATISTICS MULTIPLE CHOICE 1. Consider the following data set: 14, 14, 15, 16, 18, 19, 19, 20, 21, 22, 23, 25, 25, 25, 25, and 28. The rank assigned to the four observations of value 25 is: a. 12 b. 12.5 c. 13 d. 13.5 ANS: D PTS: 1 REF: SECTION 19.1 2. To apply the Wilcoxon rank sum test to determine whether the location of population 1 is different from the location of population 2, the samples must be: a. drawn from normal populations. b. drawn from matched pairs experiment. c. independent. d. larger than 30. ANS: C PTS: 1 REF: SECTION 19.1 3. The Wilcoxon rank sum test statistic T is approximately normally distributed whenever the sample sizes are larger than: a. 10 b. 15 c. 20 d. 25 ANS: A PTS: 1 REF: SECTION 19.1 4. Statistical methods that require few assumptions, if any, about the population distribution are known as: a. parametric techniques. b. nonparametric techniques. c. free agent techniques. d. All of these choices are true. ANS: B PTS: 1 REF: SECTION 19.1 5. The nonparametric tests discussed in your book (Wilcoxon rank sum test, sign test, Wilcoxon signed rank sum test, Kruskal-Wallis test, and Friedman test) all require that the probability distributions be: a. identical except with respect to location. b. identical except with respect to spread (variance). c. identical except with respect to shape (distribution). d. different with respect to location, spread, and shape. ANS: A PTS: 1 REF: SECTION 19.1
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2 6. Statistical methods that require, among other assumptions, that the populations be normally distributed are known as: a. distribution-free techniques. b. nonparametric techniques. c. parametric techniques. d. both a and b are correct. ANS: C PTS: 1 REF: SECTION 19.1 7. In a Wilcoxon rank sum test, the two sample sizes are 4 and 6, and the value of the Wilcoxon test statistic is T = 20. If the test is a two-tail and the level of significance is α = 0.05, then: a. the null hypothesis will be rejected. b. the null hypothesis will not be rejected. c. the alternative hypothesis will not be rejected. d. not enough information has been given to answer this question. ANS: B PTS: 1 REF: SECTION 19.1 8. Comparing the output of strawberries grown on plots using fertilizer A with that grown on otherwise identical plots using fertilizer B, in order to make a general assessment of relative fertilizer effectiveness, may well call for a: a. Friedman test. b.
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SME_8e_Ch_19_Section_1 - CHAPTER 19 SECTION 1:...

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