If the Random Variable X Is Exponentially Distributed, Then Which

Multiple Choice

If the random variable X is exponentially distributed, then which of the following statements best describes the mean of X?

A) The mean of X will be greater than the standard deviation of X.
B) The mean of X will be smaller than the standard deviation of X.
C) The mean of X will equal the standard deviation of X.
D) None of these choices are correct.