Use the rank sum test procedure to analyze the two samples
Chapter 15, Problem 15.2.4(choose chapter or problem)
Use the rank sum test procedure to analyze the two samples in DS 15.2.1. (a) Combine the two samples and rank the observations. (b) What is SA? (c) What is UA? (d) Is the value of UA consistent with the observations from population A being larger or smaller than the observations from population B? (e) Use a computer package to nd a two-sided p-value for the null hypothesis that the two distributionfunctions are identical. Is the difference between the two distribution functions suggested in part (d) statistically signicant?
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