(Solved): Assume the length X, in minutes, of a particular type of telephone conversation is a random variabl ...

Assume the length X, in minutes, of a particular type of telephone conversation is a random variable with the probability density function below. Complete parts (a) through (c) below 1 4 x 20. 1(x) -0. elsewhere FOOD (a) Determine the mean length E(X) of this type of telephone conversation E(X)= (Simplify your answer.) (b) Find the variance and standard deviation of X Var(X)= ON Time Remaining: 00:43:17 Ne Assume the length X, in minutes, of a particular type of telephone conversation is a random variable with the probability dem 4 x 20, f(x) = e ** Var(x) = ?= (Simplify your answers.) (c) Find E(X + 5)². E(X + 5)² = (Simplify your answer.) elsewhere