Mean Deviation
Arithmetic mean of the deviations from the mean of the data in a distribution of a statistical variable.
Notation
The mean deviation of a statistical distribution is generally noted as: MD.Formules
- In a statistical distribution of n data (sample) with a mean of [latex]\overline{x}[/latex], the mean deviation MD is given by:
MD [latex]\dfrac{\Sigma |x_i − \overline{x} |}{n}[/latex].
- In a statistical distribution with N data values representing an entire population in which the mean is [latex]μ[/latex], the mean deviation MD is given by:
MD = [latex]\dfrac{\Sigma |x_i − μ |}{N}[/latex].