1. Listed below are several prominent companies and their stock prices in December 2001. Go to the Web and look up today's price. There are many sources to find stock prices, such as Yahoo and CNNFI. The Yahoo address is http://www.quote.yahoo.com. Enter the symbol identification to find the current price. At the .05 significance level, can we conclude that the prices have changed?

2. The USA Today (http://www.usatoday.com/sports/mlb.htm) and Major League Baseball's Website (http://www.majorleaguebaseball.com) regularly report information on individual player salaries. Go to one of these sites and find the individual salaries for your favorite team. Compute the mean and the standard deviation. Is it reasonable to conclude that your favorite (or local) team has a mean player salary different from $1,500,000?