Plinker

A Galton board you can rig. Balls bounce left or right at each peg; bars show the observed distribution, the white curve is the exact theoretical one.

Balls

In flight

Mean

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Std dev

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Theory mean

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Theory SD

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Max |error|

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Board

Buckets 12

Peg rows 11

Link rows to buckets (rows = buckets − 1)

Frame

Spawning

Simulation clock

Speed 1.0×

Instant mode (skip animation)

Space play/pause · → step one peg row · Shift+→ one frame. Pausing freezes every ball where it is. Stepping on an empty board releases one ball, so you can walk it down peg by peg.

Spawn points

Drag the funnels along the top of the board to reposition. Weight sets how often a spawn is used; bias is its chance of bouncing right at every peg.

Gates

Display

Theoretical curve Bucket labels & percentages Show pegs