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P value?

  1. Jun 23, 2010 #1
    If I hypothesize that 70% of all my future coin tosses will come up heads, and I sample 15 coin tosses and get 13 heads, what is the probability that my hypothesis is correct?
  2. jcsd
  3. Jun 26, 2010 #2


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    Obviously you underestimated, so you need to calculate whether the difference 13/15 - 0.7 is significantly different from zero.

    See figure 1 of http://www.sportsmed.org/tabs/research/downloads/Research%208%20-%20Discrete%20Data.pdf [Broken]
    Last edited by a moderator: May 4, 2017
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