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SOLVED: To study long-distance phone service in a province, a researcher conducts a poll to estimate the percentage of consumers who are satisfied with their long-distance phone service. A previous study suggests that this percentage is about 82%. What is the smallest sample size necessary if he wants to be 95% confident that his sample percentage is within 3.5 percentage points of the true population value? 464 463 462 461 None of above.

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