This is known as sampling. The small group is referred to as a sample size which is a subset of the ... Definition, Types, and Examples." Yale University Department of Statistics and Data Science.

This sampling interval is calculated by dividing the population size by the desired sample ... procedure. It may be used when completing a list of the entire population is difficult. For example ...

The data set Customers contains an Internet service provider's current subscribers, and the service provider wants to select a sample from this population for a customer satisfaction survey. This ...

Thus far, most discussions concerning the methods used for sampling have focused on sampling requirements outside of the laboratory; for example ... sample and simple random sampling procedures ...