Answer to Question 1
B
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Grounded theory researchers typically use theoretical sampling, in which sampling decisions are guided in an ongoing fashion by the emerging theory. Ethnographers make numerous sampling decisions, including not only whom to sample but what to sample; decision making is often aided by their key informants who serve as guides and interpreters of the culture. Phenomenologists typically work with a small sample of people who meet the criterion of having lived the experience under study. Focus groups have been used by researchers in many qualitative traditions and in qualitative descriptive research.
Answer to Question 2
A
viable surface sampling using contact plates
Sampling Issues
Here’s how you can demonstrate sampling error
Distribution of F1 and F2 Progeny Derived from a Theoretical Cross Involving Tomatoes
A theoretical explanation of the biochemical basis of the four eye color phenotypes
Chorionic villus sampling (CVS)