# mean deviation

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Related to mean deviation: Mean Absolute Deviation

## mean deviation

*n.*

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

## mean deviation

*n*

**1.**(Statistics) the difference between an observed value of a variable and its mean

**2.**(Statistics) Also:

**mean deviation from the mean**,

**mean deviation from the median**

*or*

**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

## mean′ devia′tion

*n.*

*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, usu. the mean or median.

**average deviation.**

[1890–95]

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Noun | 1. | mean deviation - the arithmetic mean of the absolute values of deviations from the mean of a distributionstatistics - a branch of applied mathematics concerned with the collection and interpretation of quantitative data and the use of probability theory to estimate population parameters deviation - the difference between an observed value and the expected value of a variable or function |

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