Solved: For Exercises 4 through 11, use the Wilcoxon rank

Chapter 13, Problem 11

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For Exercises 4 through 11, use the Wilcoxon rank sum test. Assume that the samples are independent. Also perform each of these steps. a. State the hypotheses and identify the claim. b. Find the critical value(s). c. Compute the test value. d. Make the decision. e. Summarize the results. Use the traditional method of hypothesis testing unless otherwise specified.Employee Productivity A study was conducted to see whether there is a difference in the time it takes employees of a factory to assemble the product. Samples of high school graduates and nongraduates were timed. At a 0.05, is there a difference in the distributions for the two groups in the times needed to assemble the product? The data (in minutes) are shown here. Graduates 3.6 3.2 4.4 3.0 5.6 6.3 8.2 Nongraduates 2.7 3.8 5.3 1.6 1.9 2.4 2.9 Graduates 7.1 5.8 7.3 6.4 4.2 4.7 Nongraduates 1.7 2.6 2.0 3.1 3.4 3.9