In statistics, non-sampling error is a catch-all term for the deviations of estimates from their true values that are not a function of the sample chosen, including various systematic errors and random errors that are not due to sampling. Non-sampling errors are much harder to quantify than sampling errors. Non-sampling errors in survey estimates can arise from: An excellent discussion of issues pertaining to non-sampling error can be found in several sources such as Kalton (1983) and Salant and Dillman (1995),
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| - In statistics, non-sampling error is a catch-all term for the deviations of estimates from their true values that are not a function of the sample chosen, including various systematic errors and random errors that are not due to sampling. Non-sampling errors are much harder to quantify than sampling errors. Non-sampling errors in survey estimates can arise from: An excellent discussion of issues pertaining to non-sampling error can be found in several sources such as Kalton (1983) and Salant and Dillman (1995), (en)
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| - In statistics, non-sampling error is a catch-all term for the deviations of estimates from their true values that are not a function of the sample chosen, including various systematic errors and random errors that are not due to sampling. Non-sampling errors are much harder to quantify than sampling errors. Non-sampling errors in survey estimates can arise from:
* Coverage errors, such as failure to accurately represent all population units in the sample, or the inability to obtain information about all sample cases;
* Response errors by respondents due for example to definitional differences, misunderstandings, or deliberate misreporting;
* Mistakes in recording the data or coding it to standard classifications;
* Pseudo-opinions given by respondents when they have no opinion, but do not wish to say so
* Other errors of collection, nonresponse, processing, or imputation of values for missing or inconsistent data. An excellent discussion of issues pertaining to non-sampling error can be found in several sources such as Kalton (1983) and Salant and Dillman (1995), (en)
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