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Almost all stars are in binary systems.
Sampling Frames
The list or database from which a sample is drawn, representing the entire population or target group for a specific study.
Census
A study of every member of a population.
Sampling Frames
Databases or lists that are used to define and select the sample in a research study for the purpose of making generalizations about a population.
Geographic Areas
are defined regions or spaces on the Earth's surface, which can be identified by physical features, political boundaries, or cultural characteristics.
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