Standard deviation: Difference between revisions
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imported>Brianlenoach@hotmail.co.uk (Clarify by expanding wording.) |
imported>Brianlenoach@hotmail.co.uk (Remove one too many 'to's.) |
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The standard deviation is the square root of the variance. | The standard deviation is the square root of the variance. | ||
Standard deviation is used widely as a measure of risk, because it is relatively easy to calculate, and to compare and | Standard deviation is used widely as a measure of risk, because it is relatively easy to calculate, and to compare and combine with the standard deviations of other variables. | ||
Revision as of 22:42, 11 December 2014
(SD).
Standard deviation measures the spread of data around their mean.
The standard deviation is the square root of the variance.
Standard deviation is used widely as a measure of risk, because it is relatively easy to calculate, and to compare and combine with the standard deviations of other variables.
