IB Mathematics Practice Test 2026 – Comprehensive Exam Prep

The purpose of quota sampling is to set specific quotas for certain groups within the sample. This sampling method ensures that the researcher includes different segments of the population in specified proportions, which allows the sample to reflect certain characteristics of the whole population. For instance, if a researcher needs to ensure that their sample includes equal numbers of men and women, they would establish quotas for each group and continue to sample until those quotas are met. This approach can help achieve representation across key demographic variables, making it particularly useful in studies where certain group characteristics are important for the analysis.

The other methods mentioned do not achieve the same goal. Randomly selecting the entire population would utilize a different sampling method entirely and would not involve quotas. Sampling every individual in the population is complete enumeration rather than sampling, and focusing only on those who respond quickly does not ensure that different demographic groups are represented. Therefore, setting specific quotas is essential in quota sampling to ensure the resulting sample accurately reflects the population's characteristics.