Question

Relation between variance and standard deviation

Answer 1

• Variance is a numerical value that describes the variability of observations from its arithmetic mean.

• Standard deviation is a measure of dispersion of observations within a data set.  the standard deviation is the root mean square deviation.

Answer 2

hello!

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

Standard deviation is the square root of the variance so that the standard deviation.

because of this squaring, the variance is no longer in the same unit of measurement as the original data.