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Practice question 3. If the actual support for presidential candidate A was 50%, what is the probability...

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Statistics

Practice question 3.

  1. If the actual support for presidential candidate A was 50%,what is the probability that the estimate obtained from a sample of1,600 people would be less than 48%?
  2. In the Presidential Poll, 1,600 people were interviewed, and720 of those interviewed said they supported candidate A. Determinethe point estimate for A’s support.
  3. What is the mean error of this estimate?
  4. Specify a 99% confidence interval for the (actual) percentageof support.
  5. Specify a 99.9% confidence interval for the (actual) percentageof support.
  6. If 50% of the votes are needed to win, how credible do you findA’s win?

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