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View synonyms for standard deviation
standard deviation
noun
, Statistics.
- a measure of dispersion in a frequency distribution, equal to the square root of the mean of the squares of the deviations from the arithmetic mean of the distribution.
standard deviation
noun
- statistics a measure of dispersion obtained by extracting the square root of the mean of the squared deviations of the observed values from their mean in a frequency distribution
standard deviation
/ stăn′dərd /
- A statistic used as a measure of the dispersion or variation in a distribution, equal to the square root of the arithmetic mean of the squares of the deviations from the arithmetic mean.
standard deviation
- In statistics , a measure of how much the data in a certain collection are scattered around the mean . A low standard deviation means that the data are tightly clustered; a high standard deviation means that they are widely scattered.
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Notes
About sixty-eight percent of the data are within one standard deviation of the mean.
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Word History and Origins
Origin of standard deviation1
First recorded in 1920–25
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