Question: 21
(Choose 1 answer)
(See picture)
A. Mean = 0; Standard deviation = 1.5
B. Mean = 0; Standard deviation = 1
C. Mean =0.67; Standard deviation = 1
D. Mean =0.67; Standard deviation = 0.67
E. None of the other choices is correct
Suppose that the random variable X has an exponential
distribution with 21.5. Find the mean and standard
deviation of X.
