sampling error

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sampling error

[′samp·liŋ ‚er·ər]
(statistics)
That portion of the difference between the value of a statistic derived from observations and the value that it is supposed to estimate; attributed to the fact that samples represent only a portion of a population.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

sampling error

the difference between the ‘true’ value of a characteristic within a population and the value estimated from a sample of that population. ‘Error’ occurs because no SAMPLE can be expected to exactly represent the parent population from which it was drawn. To minimize, and to be able to estimate, sampling error, it is necessary to ensure that the selection of the sample is RANDOM, and this is normally done by random numbers or systematic sampling. Sampling error is not the same as BIAS or systematic error, which may occur due to the process of data collection, but is nothing to do with the sample selection.
Collins Dictionary of Sociology, 3rd ed. © HarperCollins Publishers 2000
References in periodicals archive ?
'Either may sampling errors ito o di kaya ay ang mga nagsabi nito ay nakakaramdam ng takot.'
The SWS used face-to-face interviews of 1,440 adults nationwide, with sampling error margins of +-2.6 percent for national percentages.
Also included are seven chapters on analysis of survey data, discussing the management of household survey data, basic tabular analysis, the use of multi-topic household surveys as a tool for poverty reduction, the use of multivariate statistical methods for the construction of indices from household survey data, statistical analysis of survey data, accounting for the effects of the complexity of the design on the analysis, and methods used in the estimation of sampling errors.
Population estimates have sampling errors. To evaluate the robustness of Bulmer's R and R*, Pollard et al.'s, and Dennis and Taper's tests to the effects of sampling variance, population abundances were generated from a known model and sampling errors coupled to these abundances to represent population abundance estimates.
Sampling errors were incorporated in the total annual population abundances generated from either the density-independent growth models or the density-dependent growth model.
Programs with the same shares may have different sampling errors, if the number of households or persons viewing differ at the times the programs are telecast.
Persons estimates are provided for a variety of age/sex categories each with different sample sizes and different sampling errors.
Selected estimates of sampling errors are given in A.
In the SCF, adjustments for nonresponse errors are made through systematic imputation of unanswered questions and through weighting adjustments based on data used in the sample design for families that refused participation.(9) Sampling error arises any time survey estimates are based on a sample rather than on a census.
However, sampling errors also could have occurred when a portion was taken for analysis or when the samples were collected at the foundry.
Two foundries were sampled twice to help identify the extent of sampling error.