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stat problem The length of a phone call {in minutes} has an exponential distribution with the third quartile [Il'S'Eh percentile} equal to 15 minutes. What

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The length of a phone call {in minutes} has an exponential distribution with the third quartile [Il'S'Eh percentile} equal to 15 minutes. What is the probability:r that a phone call will be more than it) minutes? Hint: Using what 1you know about percentiles, solve for the mean of the exponential and then nd the probability

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