STAT 454/854Winter 2009Handout #1Some Commonly Used Terms1.Target population: The complete collection of individuals or elements we intend tostudy, defined by the main objective of the study.2.Sampling frame: The complete list of sampling units from which the survey sampleis selected.3.Frame population: The collection of all elements covered by the sampling frame.4.Sampled population: The collection of all possible elements that might have beenchosen in a sample; the collection of all possible elements with non-zero probabilityof being selected by the survey; the population from which the sample was taken; thepopulation represented by the sample.5.Observation unit: Individual elements of the population from which response vari-able is measured.6.Sampling unit: Units we actually sample. It could be one of the two possible cases:(1) sampling unit is the same as the observation unit (i.e. the individual element), asin simple random sampling or stratified simple random sampling; (2) sampling unit is acluster, as in single-stage or multi-stage cluster sampling, or stratified cluster sampling.
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