A pollster wishes to estimate, with 90% confidence, the proportion of people who believe the United States should pursue a more aggresive foreign policy. Find the minimum sample size necessary to achieve a margin of error of less than 2%. Assuming no previous estimates are available. Round your answer up to the next integer. Assuming a previous estimate of 0.25. Round your answer up to the next integer.

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A pollster wishes to estimate, with 90% confidence, the proportion of people who believe the United States should pursue a more aggresive foreign policy.


Find the minimum sample size necessary to achieve a margin of error of less than 2%.

  1. Assuming no previous estimates are available. Round your answer up to the next integer.



  2. Assuming a previous estimate of 0.25. Round your answer up to the next integer.

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