You should have noticed by now that many distributions tend to have a bell-shaped graph as parameters are allowed to increase. Indeed, the formulas for skewness \(\gamma_1\) and kurtosis \(\gamma_2\) approach 0 and 3 respectively for the Hypergeometric 6.4.2, Hypergeometric 6.4.2, Negative Binomial 7.4.7, Poisson 8.2.5, and Gamma 8.4.3 Distributions. Each of these "limiting distributions" appear to be symmetrical (i.e. \(\gamma_1=0\)) with horizontal asymptotes of 0. The general model looks like: