Distribution drips
Distributions are easier to grasp when you can see them.
I always tell students to look first at the shape of the data they're examining. Visualising the distribution helps us understand what the data are saying and whether they need to be transformed before analysis.
This shows a sample of 1,000 random points X, drawn from different distributions. It's a simple way to see the order that underlies randomness.
I built this with the d3-random library.