Let X∼Weibull(k,λ)X \sim \text{Weibull}(k, \lambda)X∼Weibull(k,λ) with shape k=2k = 2k=2 and scale λ=1\lambda = 1λ=1. What is E[X]E[X]E[X]?
π2\frac{\sqrt{\pi}}{2}2π
π2\sqrt{\frac{\pi}{2}}2π
12\frac{1}{2}21
111