Quota market research sample

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Quota market research sample

In market research, a quota sample is a method of sampling in which researchers set specific targets for the number and characteristics of respondents to be included in the study. It is commonly used in opinion polling, consumer research, and other survey-based projects where certain sub-groups must be represented.

For example, a study on television viewing habits might specify a quota of:

  • 20 adult men.

  • 20 adult women.

  • 10 teenage girls.

  • 10 teenage boys.

Interviewers would then recruit respondents to meet these exact targets.

Unlike random sampling, a quota sample is not random, as the selection of participants is guided by the pre-determined quotas rather than chance. While this ensures that the sample reflects specific demographic characteristics, it means that statistical properties such as sampling distributions are not known, which can limit the ability to generalise findings to the broader population.

Quota sampling remains widely used because it allows researchers to efficiently achieve balanced representation across key groups, particularly when time, cost, or accessibility constraints make random sampling difficult.

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