Non-sampling error

Error in sample estimates which cannot be attributed to sampling fluctuations.

Non-sampling errors may arise from many different sources such as defects in the sampling frame, faulty demarcation of sample units, defects in the selection of sample units, mistakes in the collection of data due to personal variations, misunderstanding, bias, negligence or dishonesty on the part of the investigator or of the interviewer, mistakes at the stage of the processing of the data, etc. Non-sampling errors may be categorised as:

• Coverage errors (or frame errors) due to divergences between the target population and the frame population;
• Measurement errors occurring during data collection;
• Nonresponse errors caused by no data collected for a population unit or for some survey variables;
• Processing errors due to errors introduced during data entry, data editing, sometimes coding and imputation;
• Model assumption errors.

http://purl.org/linked-data/sdmx/2009/concept#nonsamplingErr

urn:sdmx:org.sdmx.infomodel.conceptscheme.Concept=SDMX:CROSS_DOMAIN_CONCEPTS(2.0).NONSAMPLING_ERR

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