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Stats question regarding negative binomial

  1. Feb 3, 2012 #1
    1. The problem statement, all variables and given/known data
    The problem is attached in the pdf

    2. Relevant equations

    3. The attempt at a solution
    I have the solution, I just don't really understand it. In the solution, the author takes the expected value of the negative binomial ( n(1-pi)/pi ) and plugs it into the g'(x) function. Then obviously, if you integrate that, you get the original sinh function, because we defined it that way. I don't get he'd just plug in that function.

    Attached Files:

  2. jcsd
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