sampling theory

sampling theory　抽样理论　

In statistics，quality assurance，and survey methodology，sampling is concerned with the selection of a subset of individuals from within a statistical population to estimate characteristics of the whole population.Acceptance sampling is used to determine if a production lot of material meets the governing specifications.Two advantages of sampling are that the cost is lower and data collection is faster than measuring the entire population.In statistics，quality assurance，and survey methodology，sampling is concerned with the selection of a subset of individuals from within a statistical population to estimate characteristics of the whole population.Acceptance sampling is used to determine if a production lot of material meets the governing specifications.Two advantages of sampling are that the cost is lower and data collection is faster than measuring the entire population.