Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

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


    User Avatar
    Science Advisor
    Homework Helper

Share this great discussion with others via Reddit, Google+, Twitter, or Facebook