# 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 ?
8, population standard deviation as 9 and difference between the two means as 5, a sample size of 50 for each group was determined making the total sample size of 100.
We begin by defining the population standard deviation of a random variable Z, denoted [[sigma].
There is also another result in the author's article that the 3511 cal/lb result has an uncertainty of 20% in the sample size of 51 diets, the population standard deviation, so a doctor having patients doing diets can expect some variation in response to diets.
Population Standard Deviation is only needed if you are measuring a continuous variable.
The standard deviation of the sampling distribution (sx ) is approximately equal to the population standard deviation divided by the square root of n.
The simulator was calibrated by comparing the standard deviation of the calculated pH against the population standard deviation for measured pH supplied by AUSLAB.

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