INTRODUCTION:
Quota
sampling is a nonprobability convenience sampling technique in which
the proportion of identified groups is predetermined by the
researchers. Quota sampling may be used to ensure the inclusion of
subject types or strata in a population that are likely to be
underrepresented in the convenience sample, such as women, minority
groups, elderly adults, poor people, rich people, and undereducated
adults. This method may also be used to mimic the known
characteristics of the target population or to ensure adequate
numbers of subjects in each stratum for the planned statistical
analyses.
The
technique is similar to the one used in stratified random sampling,
but the initial sample is not random. If necessary, mathematical
weighting can be used to adjust sample values so that they are
consistent with the proportion of subgroups found in the population.
ADVANTAGES:
Quota
sampling offers an improvement over convenience sampling and tends to
decrease potential biases. In most studies in which convenience
samples are used, quota sampling could be used and should be
considered.
RELATED;
1. Probability sampling designs
2. Stratified random sampling
3. Research methodology
REFERENCES
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