Consider a system, such as a barber shop, where the service required is essentially identical for each customer. Then actual service times would tend to cluster near the mean service time. Argue that...

Consider a system, such as a barber shop, where the service required is essentially identical for each customer. Then actual service times would tend to cluster near the mean service time. Argue that the exponential distribution would not be appropriate in this case. For what types of service situations might the exponential distribution be quite plausible?