A bus company provides shuttle bus services for a university from 6 a.m. to 8 p.m. Each passenger pays

$1 for a ride. The company decides to adjust the fee based on variations in the numbers of students. If the company found that the variation of the middle 50%

for the number of students who took its service is less than 40 students, then the company will maintain the same fee. If not, it will increase the fee to $1.50. The hourly number of students taking the shuttle service in a day is as follows:

95 108 85 78 80 64 97 99 85 68 65 72 87 98 67

a. Calculate the range and interquartile range for the number of students taking the shuttle service per hour in one day.

b. Based on your findings for part

a, if you were to advise the bus company, what do you think should be the final decision that the company should take?