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BE.104 Spring Problem Set 3 Sherley Due in class Thursday, March 10, 2005 See Table III from the Feb. 25, 2005 issue of Mortality Morbidity Weekly Report (Vol 54, p. 191). http://www.cdc.gov/mmwr/mmwr_wk.html 1) Generate a frequency histogram for all deaths (i.e., "All Ages" entries) in the listed cities. What should you do with the “U”’s? 2) Describe the distribution. 3) Suggest at least 3 distinct classes of “processes or factors” that might yield this distribution. Justify your answers. Will a similar distribution occur next week? 4) Generate a new distribution based on the log(X), where X = the number of deaths for each city. Describe the log-transformed distribution. How would you now describe the original data set? How might this transformation be useful to you if you were comparing death rates among U.S. cities to those among European cities? 5) Re-evaluate the frequency distribution for all deaths (i.e., "All Ages" entries) in the listed cities for its "Poisson-ness". 6)
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This note was uploaded on 11/11/2011 for the course BIO 20.010j taught by Professor Lindagriffith during the Spring '06 term at MIT.
- Spring '06