SOC205 Lecture Notes - Lecture 4: Sampling Error, Sampling Frame, Cluster Sampling
10 Oct 2013
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Sampling: selection of individuals & other units of analysis for research. Would not represent the population from which it was selected: steps to minimize bias: Use random method to pick the sample. Each element has the same chance of being selected number from a lottery cage. Have adequate sampling frame/list of potential subjects. Do not exclude certain cases as it will not represent the population. When people do not respond, it does not represent the population as those who did respond might differ from those who did not. Structured interviews: all respondents are asked exactly the same questions in the same order with the aid of a formal interview schedule. Questionnaire: written questions that the respondent completes w/o the aid of an interviewer. Probability sample: sample selected at random in which each unit in the population has a known probability of being selected. Types of probability sample: social variables related to alcohol consumption 9000 university students example.
