A bank branch located in a residential area has developed an improved process for serving customers during noon to 1:00 P.M lunch period. The waiting time in minutes (defined as time the customer enters the line to time he or she reaches the teller window) of all customers during this hour is recorded over a period of one week. A random sample of 15 customer is selected, and the result is as follows: 9.66 5.90 8.02 5.79 8.73 3.82 8.018.35 10.49 6.68 5.64 4.08 6.17 9.91 5.47
Compute the mean, median, first quartile, and third quartile.
Compute the variance, standard deviation, range, interquartile range, coefficient of variation.