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Coins and testing

  1. Apr 17, 2007 #1
    How would I compute the type 1 error rate of the following test:

    accept that coin is fair if in 30 tosses the coin gives between 11 and 19 heads (inclusive), reject otherwise.

    I guess my Ho is 11/30<p<19/30
    and H1: p < 11/30 or p > 19/30

    so type I prob = P(p < 11/30) + P(p > 19/30) both under Ho.
    Is this correct?

    thanks
     
  2. jcsd
  3. Apr 22, 2007 #2
    it should be right, i think
     
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