Some measurements in mm were made on a species of spiders,
Chapter 8, Problem 17E(choose chapter or problem)
Some measurements in mm were made on a species of spiders, named Sosippus floridanus, that are native to Florida. There are 10 female spiders and 10 male spiders. The body lengths and the lengths of their front and back legs are repeated here:
In this exercise, we shall use the Wilcoxon statistic to compare the sizes of the female and male spiders. For each of the following instructions, construct back-to-back stem-and-leaf displays:
(a) Test the null hypothesis that the body lengths of female and male spiders are equal against the alternative hypothesis that female spiders are longer.
(b) Test the null hypothesis that the lengths of the front legs of the female and male spiders are equal against a two-sided alternative.
(c) Test the null hypothesis that the lengths of the back legs of the female and male spiders are equal against a two-sided alternative.
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