The number of cars sold annually by used car salespeople is normally
distributed with a standard deviation of 14. A random sample of 420 salespeople
was taken and the mean number of cars sold annually was found to be 68. Find
the 96% confidence interval estimate of the population mean.
Note: For each confidence interval, enter your answer in the form
(LCL, UCL). You must include the parentheses and the comma between the confidence limits.
Confidence Interval =