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Thirty lecturers are randomly sampled from a random sample of five universities. This is an example of sampling. (1) simple random (2) systematic (3) quota (4) cluster A researcher used systematic sampling. The sample size was 200. The sampling interval was 250. The first element drawn was 196. The second element would therefore be (1) 396 (2) 450 (3) 446 (4) none of the above In probability sampling, as the sample size increases, the (1) sample becomes more biased (2) sampling error decreases (3) validity of the investigation decreases (4) population becomes more accessible
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