The exponential distribution is frequently applied to the waiting times between successes in a Poisson process. If the number of calls received per hour by a telephone answering service is a Poisson random variable with parameter λ=6, we know that the time, in hours, between successive calls has an exponential distribution with parameter β=1 / 6 . What is the probability of waiting more than 15 minutes between any two successive calls? | Numerade

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