80. For the data of Example 10.4 it might be more appropriate to compare medians.

a. Find the medians for the two groups. With the help of a stem-and-leaf display for each group, explain why the medians are much closer than the means.

b. Do a two-tailed permutation test to compare the medians. Given what you found in (a), explain why the result of the permutation test was to be expected.