SOCY 210 Study Guide - Final Guide: Face Validity, Collectively Exhaustive Events, Impact Assessment

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The reason we collect samples is because we want to use the sample to estimate something about the population we are sampling from. Two major types of sampling: nonprobability sampling. For what ever reason, when the units doing have an equal chance of being selected. Use of those avoidable at a particular time and place. Useful for pretesting questionnaires or other social measurement. Example: recruiting subject on a street corner. Sample selected on the basis of your own knowledge of the population you intent to study and your research question. Useful when studying a small subset of a larger population, where member of the subpopulation are easily identified. Already recruited responded provide the researcher with assistance in locating other members of the population under study. Useful when members of a population are particularly hard to locate. You are focused on a particular subgroup of a larger population.