SOCB05H3 Lecture Notes - Lecture 4: Nonprobability Sampling, Snowball Sampling, Quota Sampling
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Sample: a selection of observations that come from a population. Population: the set of all possible data values that could be observed in what you are studying. Sampling: the act or process of selecting observations from the wider population you are studying (your target population) Selecting your observations in a manner that does not ensure the results are generalizable to the target population. Used in situations where it is virtually impossible or unnecessary to ensure the generalizability of results. Examples: studying hard to find ppl or groups with unique conditions or circumstances -> (homeless individuals) Five main approaches to non-probability sampling: relying on available subjects sample is limited to available subjects. It may be useful for pretesting a questionnaire or providing information for a pilot study, but that"s about it. This technique is widely used for studying deviant (unique) cases to improve understanding of a general pattern (e. g. gays in the military, male midwives)
