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Suppose Arthur conducts a poll to estimate the proportion of voters who favor a major presidential candidate

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Suppose Arthur conducts a poll to estimate the proportion of voters who favor a major presidential candidate. Assuming that 50% of the electorate could be in favor of the candidate, determine the sample size needed so that they are 95% con dent that p, the sample proportion of all voters who favor at the candidate, is within a margin of error of .01 of p.