P(x) σ μ

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The architecture of chance made visible

01 Probability Observatory
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The Simplest
Experiment

Every probability begins with a binary question. Heads or tails. Yes or no. The universe collapses into two states, and from this simplest of experiments, the entire architecture of chance unfolds.

Click the coin to flip. Watch the ratio converge toward the inevitable 0.5 — the law of large numbers made tangible.

동전 던지기 coin toss
03

Distribution
Garden

Probability distributions are the topography of uncertainty — each curve a landscape of possible outcomes, each peak a statement about what the universe prefers.

Normal f(x) = (1/σ√2π) e-(x-μ)²/2σ²
Poisson P(k) = (λk e) / k!
Uniform f(x) = 1 / (b - a)
Exponential f(x) = λe-λx
분포 distribution
04

The Galton
Board

Sir Francis Galton’s “bean machine” demonstrates how individual randomness converges to collective order. Each ball bounces left or right at every pin with equal probability. The result: a bell curve emerges from chaos.

This is the Central Limit Theorem in physical form — the most beautiful theorem in probability.

중심극한정리 Central Limit Theorem
05

Every random event converges toward certainty

The law of large numbers promises that with enough observations, the sample mean converges to the true mean. Uncertainty dissolves into knowledge. The random becomes predictable. This is the profound paradox at the heart of probability theory.

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