Sampling may be defined as which of the following?

B
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Sampling is the process of selecting elements from a population, which is an entire aggregate of cases. An element is the basic unit of a populationusually humans in nursing research. Eligibility criteria (including both inclusion criteria and exclusion criteria) are used to define population characteristics. Researchers usually sample from an accessible population; a broader target population is the group to which they would like to generalize their results.
A key criterion in assessing a sample in a quantitative study is its representativenessthe extent to which the sample is similar to the population and avoids bias.