27. The prices per share for the 30 companies making up the Dow Jones Industrial Average are shown here (The Wall Street Journal, April 9, 2004).

a. Develop a stem-and-leaf display.

b. Use the stem-and-leaf display to answer the following questions: • What does the grouping of the data in the stem-and-leaf display tell you about the prices per share for the 30 Dow Jones companies? • What is the price-per-share range for the majority of the companies? • How many companies have a price per share of $36? • What is the most frequently appearing price per share? • What should be considered a relatively high price per share? What percentage of the companies have a price per share in this range? Which companies have a price per share in this range, and what is the price per share for each?

c. Use The Wall Street Journal or another business publication to find the current price per share for each of the 30 Dow Jones Industrial Average companies. Construct a stem-and-leaf display for these data and use the display to comment on any changes in the prices per share since April 2004.