Income is a great example of something that is not normally distributed. First, the normal distribution is over the entire real interval (-∞, ∞), while income i

Income is a great example of something that is not normally distributed. First, the normal distribution is over the entire real interval (-∞, ∞), while income is over a partially-bounded interval [0, ∞). Secondly, there's a very long tail on the upper end, but a hard-stop (at zero) at the low end. I would expect it to look more like a Pareto distribution [0], with a bit of a hump at the low-end. [0] https://en.wikipedia.org/wiki/Pareto_distribution https://en.wikipedia.org/wiki/Pareto_distribution