Suppose X is an exponential random variable with P(X<4.19)=0.632
How do I find the mean of X with just this information?
2026-05-04 18:10:06.1777918206
Mean Without Failure Rate For Exponential Distribution
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Hints:
$F_X(x)=1-e^{-\lambda x}$ and the equality in your question enables you to find $\lambda$.
$\mathbb EX=\frac1{\lambda}$