Sample Std Dev Symbol . 5 00 3 votes the standard deviation is a measure of how spread out numbers are. The standard deviation is a measure of how spread out numbers are.
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Standard deviation and variance.
They are not repeated in the list below. Standard deviation value of random variable x. Standard deviation and variance. σ x 2.
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A low standard deviation indicates that the values tend to be close to the mean also called the expected value of the set while a high standard deviation indicates that the values are spread out over a wider range.
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In statistics and probability theory the standard deviation represented by the greek letter sigma σ shows how much variation or dispersion from the average exists.