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.

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

standard deviation

(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

standard deviation - the square root of the variance

statistics - a branch of applied mathematics concerned with the collection and interpretation of quantitative data and the use of probability theory to estimate population parameters

variance - 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

Standardabweichung

keskihajonta

écart type

staðalfrávik

ส่วนเบี่ยงเบนมาตรฐาน

Mentioned in

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.

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In the present study, mean and standard deviation of HDL (in mg/dl) for A positive blood group is 44.35 [+ or -] 1.45.

A study to find out association between blood group and lipid profile

The standard deviation figures that the AYO-IV outputs are low, proving its dependability, repeatability and accuracy.

ASTM D945-16 and the AYO-IV Yerzley mechanical oscillograph can improve rubber compounding and molding operations

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.

Analytical Study of Attitude of the Teachers towards Reforms at School Level

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.

Immigration and Nationalism: A Matter of Degrees?

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.

HYPOCALCAEMIA DUE TO PHOTOTHERAPY IN TERM NEONATES WITH NEONATAL HYPERBILIRUBINEMIA

Being one standard deviation higher on agreeableness reduces lifetime earnings by about 8pc, or $267,600

How personality traits affect your paycheque

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).

Studying the Capability of Capability Studies--Part 3: Sample size, or why to forego capability studies on prototype builds

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 %.

Assessment of wetted irrigation patterns for inline and online emitters in different soil textures

Mean ages of Parkinson's diagnosis were much later - 58 years for patients whose primary prodrome was depression, with a standard deviation of 9.

Anxiety, depression may precede Parkinson's psychiatric prodrome may begin 25 years beforehand

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.

Measuring up: assessing instructor effectiveness in higher education