The waiting time on the cashiers line at the school


The waiting time on the cashier's line at the school cafeteria is exponentially distributed with mean 2 minutes. Use the central limit theorem to find the approximate probability that the average waiting time is more than 2.5 minutes for a group of 20 people. Use R and compare with the exact probability.

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Management Theories: The waiting time on the cashiers line at the school
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