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{{ printedBook.courseTrack.name }} {{ printedBook.name }} In statistics, a population consists of all members of a group of interest. Populations can vary in size and include people, animals, plants, or objects. Since it may be impractical to study every member of a population, a sample is sometimes selected to represent the population and obtain data.

For example, suppose there is a study that examines high school students' attitudes in Boston towards mathematics. In this case, the population consists of all high school students in Boston. Since it is impractical to study *every* student, a sample can be taken by using sampling methods.