Unformatted text preview: A sample is simply a subset of a larger population. For example, the set of students in your statistics class is a sample from the population of all students taking statistics in the world. 1.10 When we use summaries of sample data as if they are actually summaries of a population, we have made a statistical inference which will almost certainly be incorrect; we cannot expect our summary of the sample data to have the same value as the summary of the population data. Given that there will be some “error” in making the inference, we need to know how close our inference comes to being correct. Without a measure of the inference’s reliability (“margin of error” is one measure of reliability), we have no way of knowing how close our inference is to the truth....
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 Fall '08
 CRISSINGER
 Sociology, Statistics, Inferential Statistics

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