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Math Help - beta distribution

  1. #1
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    beta distribution

    can anyone tell me how to prove the mean and variance for the beta distribution function?
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  2. #2
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    Quote Originally Posted by sp1705 View Post
    can anyone tell me how to prove the mean and variance for the beta distribution function?
    You need to calculate two things: E(X) and E(X^2).

    Study this thread: http://www.mathhelpforum.com/math-he...oof-58973.html

    It has what you need to know.
    Last edited by CaptainBlack; February 14th 2011 at 11:30 PM.
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  3. #3
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    i realise that i need to calculate E(x) and E(x^2) but how do i integrate x*beta function to get E(x)? i really dont understand the gamma function thing the r symbol? any help?
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  4. #4
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    Quote Originally Posted by sp1705 View Post
    i realise that i need to calculate E(x) and E(x^2) but how do i integrate x*beta function to get E(x)? i really dont understand the gamma function thing the r symbol? any help?
    Have you red the thread whose link I gave you? The details of the integration are all in there. Read it. What don't you undertsand?

    "the gamma function thing the r symbol": Gamma function - Wikipedia, the free encyclopedia
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