The following table lists some of the weights from Data Set 4 in Appendix B. Those weights were measured from college students in September and later in April of their freshman year. Assume that we plan to use the Wilcoxon signed-ranks test to test the claim of no difference between September weights and April weights. What requirements must be satisfied for this test? Is there any requirement that the populations must have a normal distribution or any other specific distribution? In what sense is this Wilcoxon signed-ranks test a “distribution-free test”?
Answer to relevant QuestionsFor the matched pairs listed in Exercise 1, identify the following components used in the Wilcoxon signed-ranks test: a. Differences d b. The ranks corresponding to the nonzero values of |d| c. The signed ranks d. The sum of ...Refer to Data Set 21 in Appendix B for the weights (g) of randomly selected quarters that were minted after 1964. the quarters are supposed to have a median weight of 5.670g. Use a 0.01 significance level to test the claim ...Use the sample data given in Exercise 1 and test the claim that arrival delay times for Flight 19 and Flight 21 have the same median. Use a 0.05 significance level. The Mann-Whitney U test is equivalent to the Wilcoxon rank-sum test for independent samples in the sense that they both apply to the same situations and always lead to the same conclusions. In the Mann-Whitney U test we ...Data Set 5 in Appendix B lists performance IQ scores for random samples of subjects with blood lead levels categorized as low, medium, and high. Use a 0.01 significance level to test the claim that subjects in those ...
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