The difference of a quantity from some fixed value, usually the "correct" or "expected" one.
Deviation
See also
Absolute Deviation, Average Absolute Deviation, Difference, Mean Deviation, Signed Deviation, Standard Deviation, Statistical DispersionExplore with Wolfram|Alpha
References
Kenney, J. F. and Keeping, E. S. "Deviations." §6.3 in Mathematics of Statistics, Pt. 1, 3rd ed. Princeton, NJ: Van Nostrand, p. 76 1962.Referenced on Wolfram|Alpha
DeviationCite this as:
Weisstein, Eric W. "Deviation." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/Deviation.html