According to the Organization of Economic Cooperation and Development, South Koreans spend more hours per year on the job than people in any other developed country (The Wall Street Journal, March 1, 2010). Suppose 10 workers in South Korea and 10 workers in the United States are asked to report the number of hours worked in the last year. The results are shown in the accompanying table.

a. Set up the hypotheses to test the claim that the median annual hours worked in South Korea are greater than the median annual hours worked in the United States.
b. Calculate the value of the test statistic W.
c. Assume the normal approximation for W.
With α = 0.05, is the claim supported by the data? Explain.

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South Korea United States 2624 1560 2698 2730 2879 3215 1753 2457 2669 2259 2132 1432 1718 1456 2323 1795 2861 1600 1104 1041