Why does a Galton board explain the normal distribution? It seem that the distribution is more of a function of where the beads are dropped than showing a reversion to the mean

Question

It seems like the tendency for the beads to cluster around the middle is mostly because they were dropped right above the middle. If you move the funnel to either side, then the distribution will be correspondingly skewed.

For anyone who is not familiar with a Galton board: [https://en.wikipedia.org/wiki/Galton_board](https://en.wikipedia.org/wiki/Galton_board)

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In: 5

Answer 1

Where it’s dropped is the average. The sides show the distribution from the average.
If you move the funnel, the average will be different, but the distribution around the average will be the same.