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Math Help - Joint Distrubution

  1. #1
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    Joint Distrubution

    Let Y and Z be two independent continuous random variables with common probability density function f(x):
    2e^{-2x} if x \geq 0
    0 if x<0.

    How do you calculate the joint probability density function? I know how to do it the other way round, but I cannot see how to do this?
    Thanks
    Last edited by worc3247; June 22nd 2011 at 09:16 AM.
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  2. #2
    MHF Contributor
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    Re: Joint Distrubution

    are z and y independent?

    if so f(z,y) = f(z)f(y)
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