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What is population? What is sample?

Question

What is population? What is sample?

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Solution

Population:

In statistics, a population is the entire pool from which a statistical sample is drawn. A population may refer to an entire group of people, objects, events, hospital visits, or measurements. A population can thus be said to be an aggregate observation of subjects grouped together by a common feature.

Sample:

A sample, on the other hand, is a subset of the population. It comprises some members selected from it. When conducting research, it is almost always impossible to study the entire population that you are interested in. This is why researchers use sampling techniques to select a representative sample from the population. The sample should be representative of the population to ensure that we can generalize our findings from the sample to the population.

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