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_________ is when the target population is first divided into mutually exclusive and collectively exhaustive subpopulations (that are assumed to contain the diversity of respondents held in the target population), called clusters, then a random sample of clusters is selected/Mutually exclusive: no overlapCollectively exhaustive: covering all possibilities+Easy to implement and cost effective (e.g. geographical diversity)-Least reliable among probability techniques (cluster = small-scale representation?
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