Answer:
It is often impractical to study an entire population, so we often study a sample from that population to infer information about the larger population as a whole.
Sometimes a government wishes to try to gain information about all the people living within an area with regard to gender, race, income, and religion. This type of information gathering over a whole population is called a census.
A subset of a population is called a sub-population.
Explanation:
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