https://bigthink.com/starts-with-a-bang/...ell-curve/
KEY POINTS: Regardless of what you're attempting to measure: height, political preferences, number of flowers owned, or even coin toss results, if your sample size is large enough, you always get a Bell curve, or normal distribution. For some things that we can measure, it's easy to see why, as the variable you're seeking to measure is inherently random, and its distribution follows perfectly Gaussian statistics. But for other things, like dice rolls or coin tosses, the idea that a large number of them would result in a normal distribution is wildly counterintuitive. Mathematics, however, says otherwise... (MORE - details)
KEY POINTS: Regardless of what you're attempting to measure: height, political preferences, number of flowers owned, or even coin toss results, if your sample size is large enough, you always get a Bell curve, or normal distribution. For some things that we can measure, it's easy to see why, as the variable you're seeking to measure is inherently random, and its distribution follows perfectly Gaussian statistics. But for other things, like dice rolls or coin tosses, the idea that a large number of them would result in a normal distribution is wildly counterintuitive. Mathematics, however, says otherwise... (MORE - details)