Baseball Weekly is wondering how many years a major leaguer spends on a team before being traded. A random sample of 200 veteran major...

"Baseball Weekly" is wondering how many years a major leaguer spends on a team before being traded. A random sample of 200 veteran major league ballplayers spent a mean of 6.5 years on their team before being traded. The standard deviation of the population is 1.7 years. Using the 95% degree of confidence, what are the upper/lower limits of the confidence interval for the population mean?