Standard deviation: Difference between revisions
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imported>Doug Williamson (Add header.) |
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== See also == | == See also == | ||
* [[Coefficient of variation]] | * [[Coefficient of variation]] | ||
* [[Correlation]] | |||
* [[Correlation coefficient]] | * [[Correlation coefficient]] | ||
* [[Deviation]] | * [[Deviation]] | ||
* [[Hedging]] | |||
* [[Mean]] | * [[Mean]] | ||
* [[Mean deviation]] | * [[Mean deviation]] | ||
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* [[Sigma]] | * [[Sigma]] | ||
* [[Value at risk]] | * [[Value at risk]] | ||
* [[Variability]] | |||
* [[Variance]] | * [[Variance]] | ||
* [[Volatility]] | * [[Volatility]] | ||
Revision as of 14:58, 8 April 2021
Statistics.
(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.
Its order of magnitude is the difference, ignoring the sign, between the mean and a randomly chosen item in the population.
