PO217 Lecture Notes - Lecture 8: Quota Sampling, Simple Random Sample, Sampling Error
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Key terms: confidence interval, confidence level, non-probability sampling, population, population parameter, probability sampling, random selection, representative sample, sampling distribution, sampling error, sampling frame, simple random sampling, statistic. Overview: what a(cid:396)e (cid:862)(cid:272)ase studies(cid:863, types of (cid:862)(cid:272)ase studies(cid:863, advantages of case studies, disadvantages of case studies, comparative research. Advantages of case studies: provides a detailed examination of the case in question, contribute to the establishment of general proposition and a springboard for theory/hypothesis building. Disadvantages of case studies: does not allow for generalization beyond that case (but may offer insight that can be tested, does not constitute evidence that may contradict established generalizations. Comparative research: small n research (2 or more cases, systematically contrasts a number of cases to create stronger generalizations (text p. 146) Most similar systems and most different systems designs: more similar: eliminate (control for) similar characteristics as explanations for differences in outcomes, most different: eliminate (control for) differences in characteristics as explanations for similar outcomes.
