# standard deviation

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Related to standard deviation: variance

## 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
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

## 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
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
Translations
směrodatná odchylka
keskihajonta
écart type
staðalfrávik
ส่วนเบี่ยงเบนมาตรฐาน
References in periodicals archive ?
As a portfolio, the average expected return of the three stocks is computed at 18.5 percent with standard deviation of 28 percent.
In the present study, mean and standard deviation of HDL (in mg/dl) for A positive blood group is 44.35 [+ or -] 1.45.
The standard deviation figures that the AYO-IV outputs are low, proving its dependability, repeatability and accuracy.
Mean value 4.02 and standard deviation 1.919 in district variable declares that a little dispersion in attitude of the respondent's lies between districts.
The results suggest that a 1 percent increase in the share of a country's population who are immigrants in highly educated, highly skilled groups was associated with a 0.1 standard deviation voting change away from nationalism.
Mean and standard deviation of serum calcium level before starting phototherapy in male babies were 9.5859 and 0.6545 respectively, and in female babies 9.5350 and.
Being one standard deviation higher on agreeableness reduces lifetime earnings by about 8pc, or \$267,600
Given a standard deviation of "1" and using the formula above, we can now plot how the confidence intervals contract as sample size increases (FIGURE 3).
On one hand, the average value of inline wetted width is 33.03 cm with standard deviation of 0 cm and the coefficient of variation was 0 % while average value of online wetted width is 32.95 cm with standard deviation of 0.23 cm and the coefficient of variation was 0.69 %.
Mean ages of Parkinson's diagnosis were much later - 58 years for patients whose primary prodrome was depression, with a standard deviation of 9.
How datapoints vary from the mean directly affects standard deviation. If you have wildly fluctuating datapoints, the standard deviations will be larger.
For in-person classes, instructors' effects on final exam scores vary more than those on course grades, with a standard deviation of 0.49 compared to 0.32.

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