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[Solution Library] A pollster has asked 5000 potential voters what they plan to vote. 1700 declared Democrat (D), 1800 declared Republican (R), and the remaining

Question: A pollster has asked 5000 potential voters what they plan to vote. 1700 declared Democrat (D), 1800 declared Republican (R), and the remaining declared undecided (U).

  1. Using the Z distribution, compute the 95% Confidence Interval about ΦD and ΦR.
  2. At 95% for R, what sample size will generate a margin of error E = 0.02?

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