Basics of statistics · Part 2
How shuffling a few labels turns "that looks different" into a p-value, using every street tree in New York.
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Everything in this walk-through comes back to these. Part 1, Averages of Averages, covers sampling and the central limit theorem. Next: Loud Streets, Warm Homes. Part 4: Positive, Probably Not. Part 5: Shapes of Chance.