Peter collects data on the music scores of 200 randomly selected concertos. The sample mean of this data set is x bar = 85,252 with a sample standard deviation of 8,413 notes. Using this data and...

Peter collects data on the music scores of 200 randomly selected concertos. The sample mean of this data set is x bar = 85,252 with a sample standard deviation of 8,413 notes. Using this data and z-score, construct a 90% confidence interval for the true mean length of concertos.