S W 313 Chapter Notes - Chapter 11: Alf Landon, Nonprobability Sampling, Quota Sampling
Document Summary
Random sample a precise, scientific procedure for selecting research population elements for a sample that guarantees an equal probability of selection of each element when substantial samples are selected from large populations. Although probability sample is precise, it is not always feasible to use probability sampling techniques. If all members of a population were identical in all respects demographic characteristics, attitudes, experiences, behaviors, and so on we wouldn"t need careful sampling procedures. Fourth edition: meager budgets for conduction research, inadequate resources, or time constraints may provide difficulty. Social work research is often conducted in situations in which it is not feasible to select a probability sample. Nonprobability sampling the use of procedure to select a sample that does not involve random selection: reliance on available subjects, availability sampling a sampling method that selects elements simple because of their ready availability and convenience. In qualitative research, sampling can be more complicated than in quantitative research.
