quota sampling การใช้

• Nonprobability sampling methods include convenience sampling, quota sampling and purposive sampling.
• In the 1930s most pollsters used quota sampling, in which interviewers are asked to find and question certain numbers of people who match various profiles.
• In 1948, they used quota sampling, where interviewers were told to find so many young white men, so many elderly black women, and so on.
• Stratification is used in quota sampling, a non-random method in which the researcher identifies strata of the population and pre-determines how many participants are needed from each strata.