Population and sample standard deviation review - Khan Academy
https://www.khanacademy.org/math/statistics-probability/summarizing-quantitative-data/variance-standard-deviation-sample/a/population-and-sample-standard-deviation-review
webIf the data is being considered a population on its own, we divide by the number of data points, N. . . If the data is a sample from a larger population, we divide by one fewer than the number of data points in the sample, n − 1. . . Population standard deviation: σ = ∑ ( x i …
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