Rachel
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Khan Academy on a Stick
Range, Variance and Standard Deviation as Measures of Dispersion
Variance and standard deviation
Range, Variance and Standard Deviation as Measures of Dispersion
Variance of a population
Sample variance
Review and intuition why we divide by n-1 for the unbiased sample variance
Population standard deviation
Sample standard deviation and bias
Statistics: Standard Deviation
Statistics: Alternate Variance Formulas
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