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.

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

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