Term
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Definition
| collecting info and drawing inferences from a smaller pool |
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Term
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Definition
| using subjects that are easily available |
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Term
| Purposive or Judgemental Sampling |
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Definition
| Sample based upon knowledge of population, its elements, purposes of the study |
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Term
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Definition
| used when members of a population are difficult to locate |
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Term
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Definition
| used to ensure generalizability when researcher has some knowledge of population and its characteristics |
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Term
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Definition
| a sample that gives every member of the population a known (nonzero) chance of inclusion |
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Term
| Logic of Probability sampling |
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Definition
| 1. Sample reflects population accurately because everyone has equal chance of inclusion, 2. Sample size increases, sample becomes more representative |
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Term
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Definition
| having the same distribution of characteristics as its population |
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Term
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Definition
| degree of error to be expected of a given sample design |
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Term
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Definition
| unit, information is collected about the element and provides basis of analysis |
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Term
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Definition
| largest group you can define, "theoretically specified aggregation of study elements" |
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Term
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Definition
| list or uasi list of units composing a population from which sample is selected (i.e. class roster, prison list) |
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Term
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Definition
| every person given equal chance of inclusion |
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Term
| Systematic Random smapling |
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Definition
| after first element has been selected, every nth member from a list |
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Term
| Stratified random sampling |
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Definition
| divide population into group, take random sample from each |
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Term
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Definition
| Natural groups sampled, each group within population sampled, groups themselves treated as unit of analysis |
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