Measurement error is the difference between an observed value and the value of the quantity being measured. Random measurement error produces variation among repeated measurements, while systematic measurement error produces a persistent statistical bias. Measurement error is distinct from sampling error.
Measurement Error
See also
Absolute Error, Relative Error, Sampling Error, Statistical BiasExplore with Wolfram|Alpha
References
Moore, D. S. and McCabe, G. P. Introduction to the Practice of Statistics, 4th ed. New York: W. H. Freeman, 2002.Cite this as:
Weisstein, Eric W. "Measurement Error." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/MeasurementError.html