random error

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random error

The patternless differences observed between successive analytical results or statistical trials. Even though the individual results are patternless and unpredictable, the range of random error can be predicted with a given probability once sufficient experience has been gained. The random error is then quantified by the standard deviation, the coefficient of variation, and other statistics. See: measurement error; systematic error
See also: 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 ?
Random errors are spatially uncorrelated and remain in the data after blunders and systematic errors are rectified.
05%) instances of random errors observed which may be due to Pipetting Error, Calibration Failure and Instability of reagents or Calibration drift.
Systematic and random errors were estimated, respectively, by calculating mean and standard deviation of errors.
Sensitivity due to random errors in ToF measurement can be calculated taking partial derivative of (1) over ToF as
The amount of random error is directly related to the sample size in an inverse manner.
If the random error in equation (1) is zero then instrument is termed as reliable and if both systematic error as well as random error are zero then instrument considered as valid.
systematic, drift and random errors causing headache to the researchers and scientists at times.
7) and random error lines (259, -195) forming the 95% limits of agreement for sitting are presented in Figure 4.
Because the simulations in 10 repetitions for the random error settings led to considerable computation time, the 15 large logs were not used in the random error simulation series with the floorboard sawing patterns (Fig.
However, if the random error was large, then the average consumption of the houses of water will be large.
The SD and/or the CV are estimates of the observed random error of the device involved.
Two general types of errors are always present to some degree--systematic error and random error.