Listed below are low temperatures (in ?F) from the first half of September and the second half of September (from Data Set 11 in Appendix B). Use the Wilcoxon rank-sum test to test the claim that temperatures in the first half of September and temperatures in the second half of September have the same median. The region near the author?s home where the temperatures were recorded is known to become cooler as the fall season progresses. Do the sample data support that trend?

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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September 1–15 54 54 55 60 64 51 59 61 68 62 53 52 56 56 54 September 16–30 | 64 62 55 48 40 47 49 53 51 54 58 48 61 57 53