1.1 Populations and Samples

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Last updated 4:51 PM on 6/15/26
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7 Terms

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Population

whole set of items that are of interest (raw data)

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Census

observes or measures every member of a population

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Sample

selection of observations taken from a subset of the population which is used to find out information about the population as a whole

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Sampling units

individual units of a population

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Sampling frame

sampling units of a population are individually named or numbered to form a list

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Advantage of a census

accurate

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Disadvantage of a census

  • expensive

  • some testing destroys the item e.g. life of a battery