# standard deviation

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## standard deviation

n. Abbr. SD
A statistic used as a measure of the dispersion or variation in a distribution or set of data, equal to the square root of the arithmetic mean of the squares of the deviations from the arithmetic mean.

## standard deviation

n
(Statistics) 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

## stand′ard devia′tion

n. 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.
ThesaurusAntonymsRelated WordsSynonymsLegend:
 Noun 1 standard deviation - the square root of the variancestatistics - a branch of applied mathematics concerned with the collection and interpretation of quantitative data and the use of probability theory to estimate population parametersvariance - the second moment around the mean; the expected value of the square of the deviations of a random variable from its mean value
Translations
směrodatná odchylka
keskihajonta
écart type
staðalfrávik
ส่วนเบี่ยงเบนมาตรฐาน
References in periodicals archive ?
lower] is the tolerance of the product to the controlled parameter (the difference between the upper and lower values), [sigma] is the standard quadratic deviation of the controlled quantity.
In fact, the concentrated parameters model yielded a lower quadratic deviation and was rather more appropriate to represent the transgenic soybean hydration.
A quadratic deviation criterion gives rise to allocations that generally have the form of expectations.

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