Quota Sample

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Quota Sample

In focus groups, the predetermination to include only a certain number of persons from stated demographic groups. The quota sample system allows focus groups to be representative while keeping them manageable. For example, a quota sample may limit itself to three persons under 25, three between 25 and 50, and three over 50.
References in periodicals archive ?
Field testing was conducted using a 20% quota sample of 30 interviewees representing the population under study.
Quota samples are known to be at risk for potentially significant biases; introducing a probability-based sample for CES will more effectively insure a proper representation of the universe of nonfarm business establishments, through randomized selection techniques and the regular rotation of sample members.
Quota samples are known to be at risk for potentially significant biases, and research completed at BLS on the 1993 and 1994 benchmark revision sources suggested that the payroll estimates diverged substantially from what a more representative sample would have been expected to produce.
The sampling error for a quota sample is assumed to be about twice as large as that of a probability sample.