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NEED help for negative binomial distributon

  1. Nov 11, 2014 #1
    Hey guys, can you help me with the proofing of E(X) = r/p and Var(X) = rq/p^2
     
  2. jcsd
  3. Nov 11, 2014 #2

    mathman

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    Science Advisor

    You need to define X, r, q, and p.
     
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