Which of the Following Is Not True for an Exponential $\lambda$

Short Answer

Which of the following is not true for an exponential distribution with parameter $\lambda$ ? $\begin{array}{|l|l|}\hline A& \mu=1 / \lambda\\\hline B&\sigma=1 / \lambda\\\hline C&\text { The distribution is completely determined once the value of \( \lambda \) is known.}\\\hline D&\text {The distribution is a two-parameter distribution, since the }\\&\text { mean and standard deviation are equal.}\\\hline \end{array}$