20120804 - Measures of dispersion

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[Technology]

[<Normal page] [PEREZGONZALEZ Jose D [ed] (2012). Measures of dispersion. Journal of Knowledge Advancement & Integration (ISSN 1177-4576), 2012, page 236.]

Measures of dispersion

In statistics, measures of dispersion are a group of mathematical technologies (ie, procedures or formulas) used for describing the spread of values in a dataset or, more often, the spread of values around a measure of central tendency. Measures of dispersion typically refer to the following:

role	name
The total range of values in a distribution	range
The spread of values in nominal variables	modal dispersion, variation ratio
The spread of values around the median	interquartile range
The spread of values around the mean	standard deviation, variance

Want to know more?

Khan Academy - Range, variance and standard deviation

Khan teaches about three measures of dispersion on this video.

Khan Academy (undated - embedded from YouTube on 28 April 2012)

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Editor

Jose D PEREZGONZALEZ (2012). Massey University, Turitea Campus, Private Bag 11-222, Palmerston North 4442, New Zealand. (JDPerezgonzalez).

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