Standard Deviation - Definition, How to calculate the variance and standard deviation
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A little variance represents that the data points are close to the mean, and to each other
whereas if the data points are highly spread out from the mean and from one another indicates the high variance
average of the squared distance from each point to the mean.
shows how much variation (such as spread, dispersion, spread,) from the mean exists
extent to which the values differ from the average
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