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[See Solution] Suppose that it is a presidential election year and Ohio is one of the "swing" states. Your polling company wants to conduct a presidential

Question: Suppose that it is a presidential election year and Ohio is one of the "swing" states. Your polling company wants to conduct a presidential preference poll of the citizens of Ohio to predict which candidate will win the election.

  1. How many voters must be polled to be 95% confident of your results within +/- 3%?
  2. How many voters must be polled to be 95% confident of your results within +/- 2%?
  3. How many voters must be polled to be 95% confident of your results within +/- 1%?
  4. Discuss the effect of margin of error on sample size.

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