When a company sells shares of stock to investors, the transaction is said to take place in the prinzary nznrket. To enable investors to rescll the stock when they wish, secondary markets called stock exchanges were created. Stock exchange transactions involve buyers and sellers exchanging cash for shares of stock, with none of the proceeds going to thc companies that issued the shares (Radcliffe, Investment: Concepts, Anrilysis, Strategy, 1994). The results of the previous business day's transactions for stocks traded on the New York Stock Exchange

(NYSE) and five regional exchanges-the Midwest, Pacific, Philadelphia, Boston, and Cincinnati stock exchanges-are summarized each business day in the NYSE-Composite Transactions table in The Wall Street Journal.

a. Exanline the NYSE-Composite Transactions table in a recent issue of The Wall Street Journal and explain how to draw a random sample of stocks from the table.

b. Use the procedure you described in part a to draw a random sample of 20 stocks from a recent NYSE-Composite Transactions table.

For each stock in the sample, list its name (i.e., the abbreviation given in the table), its sales volume, and its closing price.