What makes entrepreneurs different from chief executive officers (CEOs) of Fortune 500 companies? The Wall Street .Ic&nal hired the Gallup organization to investigate this question. For the study, entrepreneurs were defined as chief executive officers of companies listed by Inc. magazine as among the 500 fastest-growing smaller companies in the United States. The Gallup organization sampled 207 CEOs of Fortune 500 companies and 153 entrepreneurs. They obtained the results shown in the table below.

a. In each of the three areas-age, education, and employment record-are the sample sizes large enough to use the inferential methods of this chapter to investigate the differences between Fortune 500 CEOs and entrepreneurs? Justify your answer.

b. Test to determine whether the data indicate that the fractions of CEOs and entrepreneurs who have been fired or dismissed from a job differ at the a = .O1 level of significance.

c. Construct a 99% confidence interval for the difference between the fractions of CEOs and entrepreneurs who have been fired or dismissed from a job.

d. Which inferential procedure provides more information about the difference between employment records, the test of part b or the interval of part c?

Explain.