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    The magic of probability – The Galton board

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    29 Comments

    6. ShadowScythe93 on

      I don’t know anything about this, but wouldn’t the beads bumping into each other influence where it goes? Compared to dropping 1,000 or whatever 1 at a time?

    7. flergnergern on

      Well if they’re all dropped in the center it’s kind of obvious they would be concentrated in the center

    9. proxyproxyomega on

      yeah but what about evenly distributed pegs and balls, it would fall as even pattern on average

    12. SlashMatrix on

      It does not bounce “randomly”, it has very tight constraints as one can see in the video.

    14. DevillesAbogado on

      I wonder if they would just one BB at a time, would all of them still end up with that distribution?

    15. Trojanheadcoach on

      Okay but this isn’t even random. You’re dropping stuff down on one skinny avenue and then sorting it through a pyramid shape. Nothing about this is random. Of course this makes the bell curve because it was designed to do that

    18. sandstone-oli on

      i mean there’s a higher concentration dropping from the center and landing in the center below

    19. Golden-Grams on

      It’s not random, if the input point stays the same. In this video, he even says that the reason the distribution happens on the board, is due to more pegs being in the center.
      >Most of the balls end up in the middle because there are more ways to get there.

      Move the input on either side of the middle, and see the distribution then. If the input changes, so will the distribution.

      It’s also not random in direction. Each time the ball “has a choice”, it is either left or right, as a pathway. That’s not random, either.

    23. PercentageOk6120 on

      This is more physics than demonstrating probability. It’s really dumb to conflate the two in terms of learning

    24. br0b1wan on

      I just finished “The Black Swan” by Nassim Nicholas Taleb. This is mentioned very briefly in the book. Taleb is quite disdainful of Gaussian bell curves, however

    27. nyybmw122 on

      What if there is no gravity? What if you were to do this out in the middle of space?

      So does this principle really show up EVERYWHERE?

    28. Impossible_Craft_108 on

      Does the result be same if we release beads at once horizontally rather than via a cone conduit. Just wondering

    29. Magic_Zach on

      “Theres more ways to get there” is a pretty good way to shorthand explain this.

      Another visual example. Take a coin and flip it 10 times. Each coin toss is random, and you are more likely to evenly get both heads and tails. In other words, you’re more likely to flip 5 heads and 5 tails, than 0 heads snd 10 tails, or 10 heads and 0 tails. The likelihood tapers off at the extreme ends of random chance. You are much more likely to get a 5/5 on this coin flip, or a 4/6. Now make it 20 times for s “cycle”. Now your “resolution” into the likelihood is better and you can see the pattern forming.

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