# Question

Automobile dealers usually advertise in the yellow pages of the telephone book. Sometimes they have to pay to be listed in the white pages, and some dealerships opt to save money by omitting that listing, assuming most people will use the yellow pages to find the telephone number. A two-year study is conducted with 20 car dealerships where in one year the dealer is listed in the white pages and the other year it is not. Ten of the dealerships are listed in the white pages the first year and the other 10 are listed there in the second year in an attempt to control for economic cycles. The following data represent the numbers of units sold per year. Is there a significant difference between the number of units sold when the dealership is listed in the white pages and the number sold when it is not listed?

Assume all companies are continuously listed in the yellow pages, that the t test is not appropriate, and that α =.01.

Assume all companies are continuously listed in the yellow pages, that the t test is not appropriate, and that α =.01.

## Answer to relevant Questions

Suppose you want to take a random sample of GMAT test scores to determine whether there is any significant difference between the GMAT scores for the test given in March and the scores for the test given in June. You gather ...Does a statistics course improve a student’s mathematics skills, as measured by a national test? Suppose a random sample of 13 students takes the same national mathematics examination just prior to enrolling in a ...Study the following Minitab output. What statistical test was run? What type of design was it? What was the result of thetest?A toy-manufacturing company has been given a large order for small plastic whistles that will be given away by a large fast-food hamburger chain with its kid’s meal. Seven random samples of four whistles have been taken. ...A brainstorm session on possible causes of a problem resulted in five possible causes: A, B, C, D, and E. Cause A has three possible sub-causes, cause B has four, cause C has two, cause D has five, and cause E has three. ...Post your question

0