1. The mean of the exponential distribution is. . . 1 1 a. え b. C.え d.え? 2. The variance of the exponential distribution is.. 1 a. 入 b. C.え d.え? 3. A conversation follows an exponential distribution, f(x) = le ー入r a) Find the probability that the conversation will be more than 5 minutes. with a mean time of 3 minutes. 3. es a. 3 b. els d. 3

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