Quota sample definitions

Quota sample

Alternative to probability sample whereby a sample is selected according to demographic or other quotas and without known probabilities of selection.
Found on http://www.agbnielsen.net/glossary/glossaryQ.asp?type=alpha&jump=none

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quota sample

a convenience sample that is adjusted to ensure that certain subgroups are not underrepresented.
Found on http://www.encyclo.co.uk/local/21001

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