Refer to the Baseball 2012 data, which report information on the 30 Major League Baseball

Refer to the Baseball 2012 data, which report information on the 30 Major League Baseball teams for the 2012 season. Assume the 2012 data represents a sample.
a. Develop a 95% confidence interval for the mean number of home runs per team.
b. Develop a 95% confidence interval for the mean number of errors committed by each team.
c. Develop a 95% confidence interval for the mean number of stolen bases for each team.