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کامپیوتر و شبکه::
شمارشگر
Instead, one can examine and/or re-measure a sample of inliers to estimate an error rate (i.e. contacting enumerators or key informants to ask additional questions).
Missing data: Answers omitted by the respondent (nonresponse), questions skipped over by the enumerator / the data entry operator or dropout (when research is undertaken overtime such as school attendance).
, question the enumerator about what may have happened and, if possible or necessary, repeat the measurement.
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