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Is the mean and mean deviation the same❓❔

1 Answer

3 votes
No.
The mean is the quotient of the sum of a set of values and the number of these values.
The mean deviation is the mean of the absolute deviations of a set of values. And the absolute deviation is the absolute value of the difference of a value and its mean.

Symbolically:
Mean:
\overline{x}=(1)/(n)\sum_(i=1)^nx_i
Mean deviation:
MD=(1)/(n)\sum_(i=1)^n|x_i-\overline{x}|

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