The Law Dictionary

Your Free Online Legal Dictionary • Featuring Black’s Law Dictionary, 2nd Ed.

MEAN DEVIATION Definition & Legal Meaning

Definition & Citations:

Defined as the average of the absolute differences of each value in a set of values to the average of all the values in that set. Absolute differences is the difference between two values expressed without plus or minus sign. For example, the average or mean of the set of values 1, 2, 3, 4, and 5 is (15/5) or 3. The difference between this average value (3) and each value in the set is 2, 1, 0, -1, and -2. The absolute differences are 2, 1, 0, 1, and 2. The average of these numbers (6 / 5) is 1.2 which is the mean deviation. Also known as mean absolute deviation. It is a measure of dispersion when the number of values or quantities is small, otherwise use standard deviation.


This article contains general legal information but does not constitute professional legal advice for your particular situation. The Law Dictionary is not a law firm, and this page does not create an attorney-client or legal adviser relationship. If you have specific questions, please consult a qualified attorney licensed in your jurisdiction.