Suppose that when a call centre has 25 CSRs, a customer waits 1.5 minutes on average for

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Suppose that when a call centre has 25 CSRs, a customer waits 1.5 minutes on average for each person ahead in the queue.
Which has the greater probability: (a) waiting more than 20 minutes when there are 25 CSRs and 7 people ahead in the queue or (b) waiting more than 20 minutes when there are 30 CSRs and 10 people ahead in the queue?
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Elementary Statistics

ISBN: 9780321225979

3rd Canadian Edition

Authors: Mario F. Triola

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