(a) Is there evidence that 9 weeds per meter reduces corn yields when comparedwith
Chapter 0, Problem 26.8(choose chapter or problem)
(a) Is there evidence that 9 weeds per meter reduces corn yields when comparedwith weed-free corn? Use the Wilcoxon rank sum test with the data above andpart of the data from Example 26.1 to answer this question.(b) Compare the results from (a) with those from the two-sample t test for thesedata.(c) Now remove the low outlier 142.4 from the data with 9 weeds per meter.Repeat both the Wilcoxon and t analyses. By how much did the outlier reducethe mean yield in its group? By how much did it increase the standard deviation?Did it have a practically important impact on your conclusions?
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