Baseball American League baseball teams play their games with the designated hitter

Chapter 23, Problem 21

(choose chapter or problem)

Baseball American League baseball teams play their games with the designated hitter rule, meaning that pitchers do not bat. The league believes that replacing the pitcher, traditionally a weak hitter, with another player in the batting order produces more runs and generates more interest among fans. Below are the average numbers of home runs hit per game in American League and National League stadiums for the 2011 season. a) Create an appropriate display of these data. What do you see? b) With a 95% confidence interval, estimate the mean number of home runs hit in American League games. c) Coors Field, in Denver, stands a mile above sea level, an altitude far greater than that of any other major league ball park. Some believe that the thinner air makes it harder for pitchers to throw curve balls and easier for batters to hit the ball a long way. Do you think the 1.354 home runs hit per game at Coors is unusual? Explain.