Dividend yield is the annual dividend per share a company pays divided by the current market price per share expressed as a percentage. A sample of 10 large companies provided the following dividend yield data (The Wall Street Journal, January 16, 2004).

Company Yield % Company Yield %

Altria Group 5.0 General Motors 3.7 American Express 0.8 JPMorgan Chase 3.5 Caterpillar 1.8 McDonald’s 1.6 Eastman Kodak 1.9 United Technology 1.5 ExxonMobil 2.5 Wal-Mart Stores 0.7

a. What are the mean and median dividend yields?

b. What are the variance and standard deviation?

c. Which company provides the highest dividend yield?

d. What is the z-score for McDonald’s? Interpret this z-score.

e. What is the z-score for General Motors? Interpret this z-score.

f. Based on z-scores, do the data contain any outliers?