Suppose 16 people in various industries are contacted in 2012 and asked to rate business conditions on several factors. The ratings of each person are tallied into a “business optimism” score. The same people are contacted in 2013 and asked to do the same thing. The higher the score, the more optimistic the person is. Shown here are the 2012 and 2013 scores for the 16 people. Use a Wilcoxon matched-pairs signed rank test to determine whether people were less optimistic in 2013 than in 2012.Assume the underlying distributions are symmetrical and that alpha is.05.
Answer to relevant QuestionsUse the Kruskal-Wallis test to determine whether groups 1 through 5 come from different populations. Let α =.01.Do workers on different shifts get different amounts of sleep per week? Some people believe that shift workers who regularly work the graveyard shift (12:00 A.M.to 8:00 A.M.) or swing shift (4:00 P.M.to 12:00 A.M.) are ...The following data are the ranks for values of the two variables, x and y. Compute a Spearman’s rank correlation to determine the degree of relation between the twovariables.Use the Wilcoxon matched-pairs signed rank test to determine whether there is a significant difference between the related populations represented by the matched pairs given here. Assume α = .05.Group 1 ... Group 25.6 ...Suppose you want to take a random sample of GMAT test scores to determine whether there is any significant difference between the GMAT scores for the test given in March and the scores for the test given in June. You gather ...
Post your question