HDFS328 Lecture Notes - Lecture 8: Nonprobability Sampling, Sampling Bias, Convenience Sampling
29 Mar 2016
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Assembling a sample and assignment to research condiions. Research begins with the topic to be invesigated. Very rarely could you ever research the whole populaion. The enire group of individuals in which you are interested in studying (could be people, girafes, golden retrievers or retroviruses) Smaller group of individuals that is representaive of the larger populaion. Accurate way of generalizing to the large pop. Two broad ways of sampling: probability sampling (individuals have a known chance of being selected, non-probability sampling (individuals do not have a known chance of being selected i. e. it might be done by researcher convenience). Simple, systemaic, straiied and cluster: simple probability sampling. All individuals within a populaion have an equal probability of being selected for paricipaion (e. g. all season icket holders) Random number table, selecing names from a hat. If you just took the irst 50 icket holders you would have a bias sample.
