Oh dear, looks like it's yet another spinoff of "How I Met Your Mother."
No, actually, this one is far more... calculating, you might say. (I'm preparing jokes for the Science Assembly!)
To preface this discussion, I will first describe the Gaussian distribution in simpler terms. Basically, it's the bell curve! There is a median value that gets most of the stuff (highest number of items), and from there the graph slopes down on both sides of the central median, like this: