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EXERCISE 1
Minutes after the U.S. presidential debate of October 3, 2000, CBS News released the results of a poll asking a group of registered voters, "Who do you think won the debate?" The results: 49% said Al Gore, 34% said George Bush, and 17% were undecided. The poll reported amargin of error of +/- 5%. (a) Assuming Poisson statistics, about how many people were polled? (b) Describe at least four possible systematic errors that may have affected these poll results. |