If the parameter of an exponential distribution is 1, then which of the following is true?
a. The density function is e-x for x ? 0.
b. The mean is equal to 1.
c. The standard deviation and variance are both equal to 1.
d. All of these choices are true.
D
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A. $32,000. B. $34,000. C. $44,000. D. $25,000.