Mathematics, 25.11.2019 23:31 brooke7768

Assume the length x in minutes for a phone conversation is a random variable with probability density function: f(x) = ce^(-x/6) x> 0 and f(x) = 0 elsewherea / determine the value of cb/ determine the probability that the phone conversation last more than 18 minutesc/ determine the expected length of a phone conversationd/ find the variance and standard deviation of xe/ determine the probability that the phone conversaion will last within 2 standard deviations of the meanf/ find e[(x + 5)^2]

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Assume the length x in minutes for a phone conversation is a random variable with probability densit...