16.9 Price Discrimination?
CASE 16.1 In Examples 16.1 through 16.4, the testing of significance was based on the rank sum of the Used Auto consumers being the first group. Suppose we associate the first group with the Midwest Auto consumers. As noted in the section (page 16-5), the rank sum for Midwest Auto consumers is 55.
used
16.9
(a) , . (b) , which is the sum of the ranks. (c) , , which is the same as in Example 16.3.