Spot real randomness
Which dot pattern uses independent random points?
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Make a prediction
Which panel is independently random?
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How it works & assumptions
One panel draws independent uniform coordinates. The other places one random point in each equal square. With N squares, expected empty squares under independent sampling are N(1−1/N)^N.
Both panels have uniform coverage in expectation, but stratified points are not independent. Panel positions are shuffled for each seed.
Random runs are reproducible from their setup links. Replay keeps the same seed; New random run changes it. A sample run need not equal the theoretical average.