Suppose That the Random Variable $x$ Has an Exponential Distribution With $\theta = 1.5$

Multiple Choice

Suppose that the random variable $x$ has an exponential distribution with $\theta = 1.5$ . Find the mean and standard deviation of $x$ .

A) $\mu " 0 ; \sigma = 1$
B) $\mu " 0 ; \sigma = 1.5$
C) $\mu " 1.5 ; \sigma = 1.5$
D) $\mu ^ { \prime \prime } 1.5 ; \sigma = 1$