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Definition

population

Contributor(s): Ivy Wigmore

A population, in statistics and other areas of mathematics, is a discrete group of people, animals or things that can be identified by at least one common characteristic for the purposes of data collection and analysis.

To gather information about a large population, data is usually gathered from a sample. For example, if market researchers wanted to get representative numbers for Millennial mobile phone users in New York City (the population) who had no landline telephone, they might randomly query a small percentage of subscribers to major carrier services within the city that were born between 1980 and 2004. 

Although the researchers would not have a precise number, as long as the sample is large enough and the study adequately controlled, they should have a number that gives them a fairly good idea of the prevalence of fixed-mobile substitution among that demographic

See an introduction to populations, sampling and parameters in statistics:

This was last updated in April 2015

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How can I explain the differences between a sample and a population to a 12 years old child with simple example?
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Population is not good for the environment.
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