Selecting Samples
Survey samples can be broadly divided into two types: probability samples and non-probability samples. Stratified sampling is a method of probability sampling such that sub-populations within an overall population are identified and included in the sample selected in a balanced way.
Read more about this topic: Survey Methodology
Famous quotes containing the words selecting and/or samples:
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—George Bernard Shaw (1856–1950)
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—Calvin Coolidge (1872–1933)