Theoretical Distribution

Concept:Poisson distribution is a discrete probability distribution for count data.Explanation:The skewness of Poisson distribution is given by $\frac{1}{\sqrt{m}}$, where $m$ is the mean.Since $m > 0$, the skewness is always positive.Thus, the Poisson distribution is always positively skewed (right-skewed).It is not symmetric unless $m \to \infty$, but never exactly symmetric for finite $m$.Answer:The Poisson distribution is always positively skewed. Therefore, the correct option is B.