STAB22H3 Chapter Notes - Chapter 10: Cluster Sampling, Stratified Sampling, Labour Force Survey
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STAB22H3 Full Course Notes
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Population: is the entire group of individuals that a researcher is interested in. It is hard to obtain information from the whole group. Sample: a part of the population that is used to collect data about the whole population. Opinion polls: is an example of a sample survey. This allows one to determine information about the whole population. These samples can be a representative" of the population. If the sample does not have suitable information, it does not represent the whole population. Two ways to determine a representative sample: first choose individuals that can represent the population in every possible way. Various political opinions: to choose a random sample. It is more efficient and easier to do. However, predictions cannot be made about who will be in the sample since these. It represents the population in every way. sample will be an approximate proportion of all the categories.
