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Homework Help: Statistics: Confidence Intervals

  1. Feb 16, 2006 #1
    Heres the problem:

    Mr. K would like to know what percentage of the senior class has watched the movie Groundhog Day. He would like to be sure to within 0.05 or 5%. He wants to compute a 90% confidence interval. How many students must he poll in order to achieve these goals?

    Help Please. Greatly Appreciated.
  2. jcsd
  3. Feb 17, 2006 #2


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