Question

Delta Air Lines wants to determine if the number of no-shows for flights originating from Detroit is higher than from Minneapolis. A sample of 20 flights is taken from each city, and the number of no-shows is determined for each flight. Which nonparametric test would you use to determine whether the number of no-shows is greater in Detroit?

Multiple Choice

• Wilcoxon signed-rank test

• Kruskal-Wallis test

• Wilcoxon rank sum (Mann-Whitney) test

• Wald-Wolfowitz one-sample runs test

Twenty customers are randomly chosen, and each is given a sample of Nut Butter ice cream to taste. The customers rank the taste of the ice cream on a 10-point scale. Each is then given a sample of Chewy Gooey ice cream to taste and rank on a 10-point scale. Based on the 20 customers’ ratings of each flavor, the research analyst conducting the survey wishes to determine if one flavor is preferred over the other. Which nonparametric test would you use to determine if there is a difference in the ratings?

Multiple Choice

• Wald-Wolfowitz one-sample runs test

• Kruskal-Wallis test

• Wilcoxon rank sum (Mann-Whitney) test

• Wilcoxon signed-rank test

Answer 1

For the 2nd problem..Wilcoxon rank sum (Mann-Whitney) test would be used...as there are two independent samples (ans)

Twenty customers are randomly chosen, and each is given a sample of Nut Butter ice cream to taste. The customers rank the taste of the ice cream on a 10-point scale. Each is then given a sample of Chewy Gooey ice cream to taste and rank on a 10-point scale. Based on the 20 customers’ ratings of each flavor, the research analyst conducting the survey wishes to determine if one flavor is preferred over the other..Wilcoxon rank sum (Mann-Whitney) test would you use to determine if there is a difference in the ratings....

For the 1st problem...use kruskal wallis test...It is used for comparing two or more independent samples of equal or different sample sizes......(ans)

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