CMN 3155 Lecture 4: CMN3155 Lecture 4 Notes
15 Sep 2017
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Lecture 4: over sampling, web based polling and cluster sampling. Longitudinal research: research that is occurring over time. However, more beneficial because you can track the same person over time. Still can be used to conduct election polls and others. Over sampling: taking strata that would normally be equally represented, but is used to reduce. In canada, instead of sampling with n=1000 and representing each province proportionately to population, each province is sampled at n=1000. By doing this, each province provides data with a moe of 3. 1. Providing data for smaller provinces (ie. pei) Re-weighting: after over sampling, redistributing the weight of the data according to its population proportion in canada to create a national snapshot of the data. Quiz question: in a study of 1000 people, liberal support is 40% everywhere except for the. Because the prairies are only 12% of the population, there are only 120 people in this survey.
