Question: A problem with a telephone line that prevents a customer from receiving or making calls is upsetting to both the customer and the telephone company.

A problem with a telephone line that prevents a customer from receiving or making calls is upsetting to both the customer and the telephone company. The file contains samples of 20 problems reported to two different offices of a telecommunications company and the time to clear these problems (in minutes) from the customers' lines:
Central Office I Time to Clear Problems (Minutes)

A problem with a telephone line that prevents a customer
Central Office II Time to Clear Problems (Minutes)
A problem with a telephone line that prevents a customer
a. Is there evidence of a difference in the median time to clear problems between offices? (Use a = 0.05.)
b. What assumptions must you make in (a)?
c. Compare the results of (a) with those of Problem 10.9(a) on page 353.

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