Given X∼Poisson(λ)X \sim \text{Poisson}(\lambda)X∼Poisson(λ), find the skewness γ1\gamma_1γ1.
γ1=λ\gamma_1 = \lambdaγ1=λ
γ1=λ\gamma_1 = \sqrt{\lambda}γ1=λ
γ1=1λ\gamma_1 = \frac{1}{\sqrt{\lambda}}γ1=λ1
γ1=1λ\gamma_1 = \frac{1}{\lambda}γ1=λ1