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Math Help - Moment generating function question #1

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    Moment generating function question #1

    Let f(x) = (1/6) x^3 e^(-x) for 0 < x < +infinity.

    Find the m.g.f. M(t) , and the values of mu and sigma squared.
    Last edited by mr fantastic; October 20th 2009 at 03:30 PM. Reason: Moved from original thread and re-titled.
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    Quote Originally Posted by affelix View Post
    Let f(x) = (1/6) x^3 e^(-x) for 0 < x < +infinity.

    Find the m.g.f. M(t) , and the values of mu and sigma squared.
    Getting the m.g.f requires using a definition. Do you know what that definition is? Where do you get stuck in using it?

    Read http://www.mathhelpforum.com/math-he...stion-2-a.html for getting mean and variance.
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