Standard deviation: Difference between revisions
From ACT Wiki
Jump to navigationJump to search
imported>Doug Williamson m (Categorise the page and add link to qualification.) |
imported>Brianlenoach@hotmail.co.uk (Clarify by expanding wording.) |
||
| Line 5: | Line 5: | ||
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, compare and combine with the standard deviations of other variables. | Standard deviation is used widely as a measure of risk, because it is relatively easy to calculate, and to compare and to combine with the standard deviations of other variables. | ||
Revision as of 22:41, 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 to combine with the standard deviations of other variables.
