'''Exponential Random Variable'''

$S_X=[0,\infty)$

$f_X(x)=\lambda e^{-\lambda x}$
 $x\ge 0$ and $\lambda>0$

$E[X]=\frac1{\lambda}$

$V[X]=\frac1{\lambda^2}$

'''exponential RV'''는 [[memoryless_property]]를 갖는 유일한 continuous RV이다.

Related: [[VG:지수분포,exponential_distribution]]

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Source: Leon-Garcia Table 4.1 (Continuous RVs)
Up: [[연속확률변수,continuous_RV]]