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Instructional Video
Khan Academy: Simulation Providing Evidence That (N 1) Gives Unbiased Estimate Instructional Video
Khan Academy

Khan Academy: Simulation Providing Evidence That (N 1) Gives Unbiased Estimate

9th - 10th
A video showing why we divide by n-1 when we calculate our sample varience and why that give us an umbiased estimate of population variance.
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