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A consumer investigator obtained prices from mail-order companies and computer stores. The accompanying lists show the prices (in dollars) quoted for cartons of floppy disks from various manufacturers. Use the Wilcoxon rank-sum test to test the claim that there is no difference between mail order and store prices.
Use a 0.05 significance level with the indicated test. If no particular test is specified, use the appropriate nonparametric test from this chapter. |
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