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How does leagues differ in average number of runs scored

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Question: Baseball 2006. 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 runs scored in American League and National League stadiums for the 2006 season.

420_Baseball.png

a) Create an appropriate display of these data. What do you see?

b) With a 95% confidence interval, estimate the mean number of runs scored 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 10.5 runs scored per game at Coors is unusual? Explain.

d) Explain why you should not use two separate confidence intervals to decide whether the two leagues differ in average number of runs scored.

Reference no: EM131744885

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