02 Quota sampling Quota sampling u Quota sampling

02 Quota sampling

Quota sampling u. Quota sampling, refers to the sampling method in which the investigator classifies or stratifies the overall sample according to a certain mark, determines the sample amount of various (layer) units, and randomly selects samples within the quota. u. There are similarities between quota sampling and stratified random sampling. All units in the population are classified in advance according to their attributes and characteristics, which we call "control characteristics" For example, the gender, age, income, occupation and education level of consumers in the market survey. Then, the sample amount is allocated according to each control characteristic.

Quota sampling It is applicable to the case that the design investigator has a certain understanding of the relevant characteristics of the whole, but the sample number is large, the cost is not high so it is easy to implement, and it can meet the requirements of the overall proportion. It is easy to cover up the deviation that cannot be ignored, and it is very difficult to calculate. Sometimes it can also be used effectively for field research. For example, in a study of formal groups, you should interview leaders and members of the group. If you study a student organization, you should visit both the radicals and the gentler members of the organization.