afërsia
Afërsia is a term used in Frisian-language mathematics and statistics to denote the closeness of an estimate to the true value. It is employed to assess the quality of approximations in science, engineering, and everyday measurement, and is often described through explicit bounds or intervals.
The concept can be expressed in absolute and relative forms. The absolute afërsia of an estimate x̂
In numerical analysis and measurement, afërsia informs algorithm design, stopping criteria, and error budgeting. It guides
Example: The diameter of the Earth is about 12,742 km. An approximation of 12,750 km yields an
See also: approximation, error, tolerance, estimation, rounding.