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standard deviation

Overview page. Subjects: Science and Mathematics.

A measure of the dispersion of data in statistics. For a set of values a 1, a 2, a 3, … an , the mean m is given by (a 1 + anull...

standard deviation

in Dictionary of the Social Sciences

January 2002; p ublished online January 2002 .

Reference Entry. Subjects: Social Sciences. 123 words.

A statistical measure, standard deviation describes the degree of deviation of a set of values in a distribution from the

standard deviation

in World Encyclopedia

P ublished online January 2004 .

Reference Entry. Subjects: General Studies. 73 words.

In statistics, a measure of deviation of observed data or scores from the mean. A small standard deviation indicates

standard deviation

in A Dictionary of Ecology

P ublished online September 2015 .

Reference Entry. Subjects: Ecology and Conservation. 45 words.

In statistics, the extent to which data depart from the mean, given by: , where σ is the standard deviation, the sum of the deviations of each datum (...

standard deviation

in A Dictionary of Geology and Earth Sciences

January 2013; p ublished online September 2013 .

Reference Entry. Subjects: Earth Sciences and Geography. 59 words.

A measure of the normal variation within a set of data. In any given measurement, two-thirds of the samples fall within one standard deviation on either side of the mean, 95% between two...

standard deviation

in A Dictionary of Ecology

January 2010; p ublished online January 2010 .

Reference Entry. Subjects: Ecology and Conservation. 42 words.

In statistics, the extent to which data depart from the mean, given by: , where σ is the standard deviation,

standard deviation

in A Dictionary of Genetics

January 2013; p ublished online January 2014 .

Reference Entry. Subjects: Genetics and Genomics. 65 words.

a measure of the variability in a population of items. The standard deviation of a sample is given by the

standard deviation

Overview page. Subjects: Science and Mathematics.

A measure of the dispersion of data in statistics. For a set of values a 1, a 2, a 3, … an , the mean m is given by (a 1 + anull...

standard deviation (s)

in A Dictionary of Genetics

January 2007; p ublished online January 2007 .

Reference Entry. Subjects: Genetics and Genomics. 60 words.

a measure of the variability in a population of items. The standard deviation of a sample is given by the

A note on standard deviation and standard error

in Teaching Mathematics and its Applications: An International Journal of the IMA

June 2010; p ublished online March 2010 .

Journal Article. Subjects: Mathematics; Education. 0 words.

Many students confuse the standard deviation and standard error of the mean and are unsure which, if either, to use in presenting data. In this article, we endeavour to address these...

The statistical analysis of standard-cost deviations

in IMA Journal of Management Mathematics

March 1997; p ublished online March 1997 .

Journal Article. Subjects: Mathematics. 0 words.

Very little is known about the theoretical statistical properties of accounting numbers. In this papera probability modelling technique is used to analyse the volume, efficiency, and price...

Decreased nocturnal standard deviation of averaged NN intervals

in European Heart Journal

November 2003; p ublished online November 2003 .

Journal Article. Subjects: Cardiovascular Medicine. 4536 words.

Aims Risk-stratification of asymptomatic Brugada Syndrome (BS) patients remains a key-issue. A typical spontaneous BS-ECG pattern and ventricular tachycardia (VT)/ventricular...

standard deviation

in A Dictionary of Biology

January 2008; p ublished online January 2008 .

Reference Entry. Subjects: Biological Sciences. 75 words.

A measure of the dispersion of data in statistics. For a set of values a 1, a 2,

standard deviation

in A Dictionary of Biology

April 2019; p ublished online April 2019 .

Reference Entry. Subjects: Biological Sciences. 130 words.

In statistics, a measure of the dispersion of data about the mean. For a set of values a 1, a...

standard deviation

in A Dictionary of Biology

June 2016; p ublished online September 2015 .

Reference Entry. Subjects: Biological Sciences. 98 words.

A measure of the dispersion of data in statistics. For a set of values a 1, a 2, a 3...

standard deviation

in A Dictionary of Business and Management

January 2016; p ublished online February 2016 .

Reference Entry. Subjects: Business and Management. 72 words.

A measure of the dispersion of statistical data. For a series of n values x 1, x 2,

standard deviation

in A Dictionary of Business and Management

January 2009; p ublished online January 2009 .

Reference Entry. Subjects: Business and Management. 74 words.

A measure of the dispersion of statistical data. For a series of n values x 1, x 2, x n...

standard deviation

in A Dictionary of Business Research Methods

P ublished online January 2016 .

Reference Entry. Subjects: Business and Management. 198 words.

*Descriptive statistics; the most commonly used *measure of dispersion, it is an indication as to how

standard deviation

in A Dictionary of Chemical Engineering

January 2014; p ublished online September 2014 .

Reference Entry. Subjects: Engineering and Technology. 108 words.

A statistical measure of the dispersion of a set of data from the mean and equal to the square root of the ...

standard deviation

in A Dictionary of Computer Science

January 2016; p ublished online January 2016 .

Reference Entry. Subjects: Computing. 6 words.

standard deviation

in A Dictionary of Computing

January 2008; p ublished online January 2008 .

Reference Entry. Subjects: Computing. 6 words.