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Describe the defining characteristic of probability sampling and explain the essential prerequisite required before a researcher can begin this type of sampling.
Question: Describe the defining characteristic of probability sampling and explain the essential prerequisite required before a researcher can begin this type of sampling.
Sample answer: The defining characteristic of probability sampling is that the researcher can mathematically specify the exact probability that each member of the defined population will be selected for the sample. The essential prerequisite before sampling begins is having a clear and precise specification of the target population.
Key points:
- Identifies that researchers can mathematically specify selection probabilities.
- Notes that it applies to each member of the defined population.
- States the prerequisite of clearly and precisely specifying the target population before sampling.
Rubric: Full credit is awarded if the student accurately defines probability sampling by mentioning the mathematical specification of selection probabilities and correctly identifies the prerequisite of clearly defining the target population.
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Research Methods in Psychology - 4th American Edition @ KPU
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