The Difference between the measured or inferred value of a quantity and
its actual value , given by

(sometimes with the Absolute Value taken) is called the absolute error. The absolute error of the Sum or Difference of a number of quantities is less than or equal to the Sum of their absolute errors.

**References**

Abramowitz, M. and Stegun, C. A. (Eds.).
*Handbook of Mathematical Functions with Formulas, Graphs, and Mathematical Tables, 9th printing.*
New York: Dover, p. 14, 1972.

© 1996-9

1999-05-25