2.22 The operations manager at a plant that bottles natural spring water wants to be sure that the filling process for 1-gallon bottles (1 gallon is approximately 3.785 liters) is operating properly. A random sample of 75 bottles is selected and the contents are measured. The volume of each bottle is contained in the data file Water.

a. Find the range, variance, and standard deviation of the volumes.

b. Find and interpret the interquartile range for the data.

c. Find the value of the coefficient of variation.