The data on the next page are extracted from the top ten entries in the Financial Post list of top 500 companies. The number of employees is given in thousands and the revenues for 1997 are given in billions of dollars. Is there a significant linear correlation between these companies' revenues and their numbers of employees? Would you necessarily expect that your results for these top companies would apply to all companies on the list, or to those that did not make the list?

In Exercises 19-22, describe the error in the stated conclusion. (See the list of common errors included in this section.)

Employees 29 122 24 30 16 3 83 50 43 33 Revenues 34.2 33.2 27.9 17.2 16.7 14.2 13.9 12.1 112 10.8