27. How Long Is the Line? To decide on the number of service counters needed for stores to be built in the future, a supermarket chain gathered information on the length of time (in minutes)

required to service customers, using a sample of 60 customers’ service times, shown here:

a. Construct a relative frequency histogram for the supermarket service times.

b. Describe the shape of the distribution. Do you see any outliers?

c. Assuming that the outliers in this data set are valid observations, how would you explain them to the management of the supermarket chain?

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