Answer to Question 1
3
Rationale 1: Purposive sampling involves handpicking participants from the accessible population, which does not have to be large.
Rationale 2: Judgmental sampling is another name for purposive sampling. Purposive sampling involves handpicking participants.
Rationale 3: Snowball sampling involves accessing participants because they associate with participants previously identified by the researcher; it is a form of convenience sampling.
Rationale 4: It is in purposive or judgmental research that the researcher selects, or handpicks, elements that the researcher believes are typical of the population.
Global Rationale:
Answer to Question 2
112
Rationale: If a target population contains 3,360 elements, the sampling interval would be 112 because a sampling interval is determined by dividing the number of population elements (3,360) by the number of elements (30) the researcher seeks to study.
Global Rationale:
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viable surface sampling by swab
Chorionic villus sampling (left) and amniocentesis (right)