The standard deviation is the square root of variance and can be interpreted as a distance on a diagram (unlike variance which has squared units); it is denoted by the Greek letter sigma.
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“the standard deviation, which is the square root of this value. That can be interpreted much more reasonably as a distance on our diagram, and it's commonly denoted with the Greek letter sigma”
Created: 8/10/2026, 3:51:19 PM
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