Variance, Standard Deviation

Tuesday, 2 July 2019

12:36 PM

The variance is the average of the squared deviations from the mean.

 

// We square this value so that positive and negative deviations from the mean do not cancel out.

 

 

 

Note -  instead of .

 

 -> number of degrees of freedom

 

 

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The standard deviation is the square root of the variance