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Math Help - what is the meaning of

  1. #1
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    what is the meaning of

    f_Y(y)

    f means density function what are Y and y
    ?
    Last edited by transgalactic; February 2nd 2010 at 01:05 AM.
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  2. #2
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    Quote Originally Posted by transgalactic View Post
    f_Y(y)

    f means density function what are Y and y
    ?
    Y is the random variable. And since f is a function, .....
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  3. #3
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    what is y then?
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  4. #4
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    Quote Originally Posted by transgalactic View Post
    what is y then?
    Well, if I have a function g(x), say, what is x ....? Perhaps you need to go back to revise your pre-calculus work on functions.
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  5. #5
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    Quote Originally Posted by transgalactic View Post
    f_Y(y)

    f means density function what are Y and y
    ?
    It is the density of the RV Y evaluated at y.

    CB
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  6. #6
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    Quote Originally Posted by CaptainBlack View Post
    It is the density of the RV Y evaluated at y.

    CB
    i see your words are much closer to what i am looking for

    can you say what is RV
    why Y evaluated by y

    can you give a simple example so it will be clear
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  7. #7
    MHF Contributor harish21's Avatar
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    Quote Originally Posted by transgalactic View Post
    i see your words are much closer to what i am looking for

    can you say what is RV
    why Y evaluated by y

    can you give a simple example so it will be clear
    RV means a random vairable

    Y being evaluated at y means you are finding the pdf(probability density function) of the random variable!
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  8. #8
    MHF Contributor matheagle's Avatar
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    meaning of...

    life?
    well that's 42.
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