Question 2 (Total of 18 marks)

Problems with a telephone line that prevent a customer from receiving or making calls are disconcerting to both the customer and the telephone company. The following data represent a sample of 20 problems reported at the central office of a telephone company and the time taken to clear those problems recorded in minutes.

Central Office: Time taken to clear problems (minutes) 2.52 0.78 0.93 1.02 1.48 1.60 1.75 2.97 3.93 5.45 0.53 0.80 0.97 1.05 1.48 1.60 2.85 3.10 4.15 6.32