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      <marc:subfield code="a">Coverage technical report, Census of population, 2021.</marc:subfield>
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      <marc:subfield code="a">Issued also in French under title: Rapport technique sur la couverture, Recensement de la population, 2021.</marc:subfield>
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      <marc:subfield code="a">Includes bibliographical references (page 105).</marc:subfield>
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      <marc:subfield code="a">"The 2021 Census required the participation of the entire population of Canada, roughly 37 million persons over a territory of 9 million square kilometres. Although data collection and processing have to meet rigorous quality standards, it is impossible to eliminate all errors ... This technical report examines coverage errors in the 2021 Census. There are two types of coverage errors. The first, called population undercoverage, refers to excluding persons who should have been enumerated. The second, called population overcoverage, refers to either including persons who should not have been enumerated or enumerating persons more than once. In the first instance of overcoverage, the overall error is considered negligible. Undercoverage is generally more common than overcoverage"--Introduction, page 1.</marc:subfield>
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