average deviation
Also found in: Dictionary, Thesaurus, Acronyms.
Related to average deviation: standard deviation, quartile deviation
average deviation
[′av·rij ‚dē·vē′ā·shən] (mathematics)
In statistics, the average or arithmetic mean of the deviation, taken without regard to sign, from some fixed value, usually the arithmetic mean of the data. Abbreviated AD. Also known as mean deviation.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.