Question

Answer the question True or False. 15) The Wilcoxon rank sum test is used to test the hypothesis that the probability distributions associated with two populations are equivalent. A) True B) False 16) The Wilcoxon rank sum test is recommended for comparing discrete distributions. A) True B) False 17) 17) When performing a rank test comparing two populations, we rank the sample observations from both populations as though they were drawn from the same population. A) True B) False 18) 18) For the Wilcoxon rank sum test to be valid, the number of ties in the measurements needs to be small relative to the sample sizes. A) True B) False 13 Solve the problem. 19) A marketing study was conducted to compare the mean age of male and female purchasers of a certain product. Random and independent samples were selected for both male and female purchasers of the product. It was desired to test to determine if the distribution of ages of all female purchasers was shifted to the right of the distribution of ages of all male purchasers. What type on nonparametric analysis should be used? A) The Sign Test B) The Wilcoxon Signed Rank Test C) The Kruskal-Wallis H - Test D) The Friedman Fr-Test E) The Wilcoxon Rank Sum Test 20) Online classes are becoming more and more prevalent at the college level. A statistics instructor randomly sampled ten students from his traditional face-to-face class and ten students from his online class to compare their comprehension of the material that was taught in the class. He administered the same final exam to each student and wants to use the Wilcoxon Rank Sum test to compare their exam scores. The results are shown below: Traditional Class 82 91 75 68 93 85 74 70 56 82 Online Class 67 66 72 73 77 76 48 81 86 92 What alternative hypothesis should the instructor test to show that the students in the traditional class outperformed the students in the online class? A) The distribution of exams scores for the traditional class is shifted to the right of the distribution of exams scores for the online class B) The distribution of exams scores for the traditional class is shifted to the left of the distribution of exams scores for the online class. C) The distribution of exams scores for the traditional class is shifted to the right or to the left of the distribution of exams scores for the online class. D) The distribution of exams scores for the traditional class is identical to the distribution of exams scores for the online class

Answer 1

(15 (B) False (16) (B) False 17 A True (40)| (A) Trie Tol (6) The Wilcoson to signed Rank test scam scores (20) Let u denotes mean of from face to face Lo denotes mean of om online alles Ho = M2 OUD_Score I Audento والكونطوال AT (B ablat wave should be hypothesis the to be