Examlex
A ______________ primary key is composed of more than one column so that the row is unique.
Snowball Sampling
A non-probability sampling technique where existing study subjects recruit future subjects from among their acquaintances, often used in studies with hard-to-reach populations.
Purposive Sampling
A non-random sampling technique where participants are chosen based on particular characteristics or qualities relevant to the study.
Convenience Sampling
A non-probability sampling technique where subjects are selected due to their convenient accessibility and proximity to the researcher.
Quota Sampling
A non-random sampling technique where researchers aim to represent major characteristics of a population by selecting a proportional number of participants from each subgroup.
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