Essentials

NONPARAMETRIC STATISTICS 2256. In a two-way chi-square test of independence involving 96 participantsclassified into six religious categories and four political preferences, howmany degrees of freedom will be associated with the test?(a) 4(b) 15(c) 18(d) 247. To perform the Mann-Whitney test,(a) the scores are ranked separately for each group.(b) the scores are combined into one large group before ranking.(c) the two groups must be the same size.(d) the ranks for one group are added to the ranks for the other group.8. To perform the Wilcoxon signed-rank test you must first(a) rank-order the difference scores separately for positive and negative differences.(b) rank-order the difference scores while ignoring their signs.(c) rank-order the scores before finding the differences.(d) delete any nonzero difference scores that are tied.9. The size of the Kruskal-Wallis test statistic, H, increases as the sums ofranks for each group(a) increase.(b) decrease.(c) become more alike.(d) become more different.10. Suppose that 10 participants are each measured under four conditions.Before you apply the formula for the Friedman test,(a) all 40 scores are ranked together.(b) the 10 scores in each condition are ranked separately.(c) the four scores for each participant are ranked separately.(d) the ranks are summed separately for each participant.Answers: 1. d; 2. a; 3. b; 4. a; 5. d; 6. b; 7. b; 8. b; 9. d; 10. c.