Margin of error = 0.02; confidence level = 95%; likely range = 0.4 to 0.7 We have
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We have specified a margin of error, a confidence level, and a likely range for the observed value of the sample proportion. For each exercise, obtain a sample size that will ensure a margin of error of at most the one specified (provided of course that the observed value of the sample proportion is further from 0.5 than the educated guess).
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