The staff of Mr. Wayne Wertz, VP of Operations at Portland Peoples Bank, prepared a cumulative frequency ogive of waiting time for walk-in customers. 450 400 350 300 250 200 150 100 50 1 2 3 4 7 10 Waiting Time (minutes) The percentage of walk-in customers waiting between 1 and 6 minutes was O 67% O 37% O 22% O 11% O 10% Number of Customers

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