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Unformatted text preview: 5. Sampling biases may occur because the names on the grave markers suggest that those buried in the Chapel Hill cemetery were perhaps most, if not all, white, Anglo-Saxon, Protestant individuals. Although this demographic may represent the majority of Chapel Hill, it does not account for all people living in Chapel Hill, and thus is not a true random sample. The people buried in the cemetery may have been those with connections to the university, or people of a high standing in society, and if that is the case, then this is also not a random sample. In addition, older grave markers were illegible, discounting them from the sample of those born before 1890. These sampling biases may have increased the actual calculated values of survivorship and life expectancy, as dietary and exercise habits in less affluent demographic groups may cause the life expectancy of those groups to decrease and, overall, decrease the survivorship and life expectancy of the population as a whole....
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This note was uploaded on 11/05/2011 for the course BIOL 201 taught by Professor Mitchell during the Fall '07 term at UNC.
- Fall '07