For the exponential distribution f(x)=λe−λxf(x) = \lambda e^{-\lambda x}f(x)=λe−λx for x≥0x \ge 0x≥0, what is the median?
1/λ1/\lambda1/λ
λln(2)\lambda \ln(2)λln(2)
ln(0.5)\ln(0.5)ln(0.5)
ln(2)/λ\ln(2)/\lambdaln(2)/λ