# systematic error

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Related to systematic error: Parallax error

## systematic error

Etymology: Gk, systema + L, errare, to wander
a nonrandom statistical error that affects the mean of a population of data and defines the bias between the means of two populations.

## systematic error

The residual error after random error has been subtracted from total error. See: bias; proportional error

## systematic error (sis´təmat´ik),

n a nonrandom statistical error that affects the mean of a population of data and defines the bias between the means of two populations.

## error

the wrong answer in an experiment or result to a questionnaire.

experimental error
of two types, errors of objectivity when the experimenter knows the groups and the expected result, and errors of detection or measurement due to inadequate technique or the uneven application of measuring techniques.
random error
error which occurs due to chance, such as sampling error.
sampling error
one due to the fact that the result obtained from a sample is only an estimate of that obtained from using the entire population.
systematic error
when the error is applied to all results, i.e. those due to bias.
error types I and II
in making a statistical test, you can reject the null hypothesis when it is true (type I) or accept the null hypothesis when it is false (type II).
References in periodicals archive ?
A promising direction for the further development of the proposed multifrequency algorithms in order to improve the metrological characteristics can be the consideration of their systematic errors.
Removing of the systematic errors (biases) from the measurement results allowed increasing the accuracy (st, deviation) of measurements from 0.
total stations, levels, Global Navigation Satellite Systems), accuracies and the systematic errors of most of the available laser scanners are not well-known.
In contrast to the error in knot diameter, for the dead knot border position error, the effects seemed to resemble those of the negative rather than the positive levels of the systematic error for the observed instances of the two lower error levels tested.
The Total Error (TE) is the sum of the systematic error (SE) and the Random Error (RE): TE = SE + RE.
To correct for these systematic errors during a user calibration, you measure a set of known standards, compare the measured value to the value of the known standard to calculate the error for each data point, and finally apply the appropriate error correction for each frequency point in the measurement.
This is not a systematic error because the error occurs for everyone with equal likelihood.
Quinn [1] at London in 1998--two centuries after Cavendish--a variety of papers described the methods of measurement and their potential accuracy related to the disturbances and systematic errors.
Every forecast quality measure has been computed taking into account the systematic error of the forecast systems.
It is desirable that tests described in any performance evaluation Standard be sensitive to all sources of systematic error including geometric misalignments.
Note that faults in the chillers can also be detected if they cause the indirect measurement to deviate greatly from the direct measurement since the derivation will be taken as a systematic error in the direct measurements.
The gas industry's major requirement is to minimize systematic errors of measurement in order to make bills as accurate as possible (of course, taking into account financial constraints).

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