mean deviation

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noun Statistics.

a measure of dispersion, computed by taking the arithmetic mean of the absolute values of the deviations of the functional values from some central value, usually the mean or median.

Origin of mean deviation

First recorded in 1890–95

Also called average deviation.

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British Dictionary definitions for mean deviation

mean deviation

noun statistics

the difference between an observed value of a variable and its mean

Also: mean deviation from the mean, mean deviation from the median, average deviation a measure of dispersion derived by computing the mean of the absolute values of the differences between observed values of a variable and the variable's mean

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

mean deviation in Science

mean deviation

In a statistical distribution, the average of the absolute values of the differences between individual numbers and their mean.