NUR 408 Lecture Notes - Lecture 4: Convenience Sampling, Simple Random Sample, Nonprobability Sampling
Document Summary
Sample: population, entire aggregate, n, sample, subset of population elements, n. Types of sampling: nonprobability sampling, does not involve selection of elements at random, non-probability sampling techniques, representative, convenient, cost, sampling techniques in quan, convenience, quota, consecutive, purposive, probability sampling. What does random sampling mean: same chance of being in study, getting into the study (intervention vs. control) Simple random sampling: most basic, equal chance of being chosen, sampling frame, use a table of random numbers/ computer program, example: medicare claims data. Random selection vs. random assignment: random selection, all people in the population of interest may be chosen to participate in a study, random assignment, allocation of subjects to either an experimental or control group. Stratified random: arrange into strata, used to identify subgroups to include, gender in population of older persons age 65+ is typically, 66% women, 34% men. Stratified random sampling: divided into groups before randomized.
