Galton Board — Bean Machine
Balls fall through pegs, building binomial → normal distribution in real time.
Controls
Rows:
12
Balls per drop:
3
Bias p (right):
0.50
Clear
Pause
Balls:
0
Mean:
—
Std dev:
—
Expected σ:
—
Each peg: ball goes left (p)
or right (1−p).
Bin k has C(n,k)·pᵏ·(1-p)ⁿ⁻ᵏ
probability. By CLT, approaches
normal as n → ∞.