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Math Help - Could someone please help me with this

  1. #1
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    Exclamation Could someone please help me with this

    The probability mass function of the discrete random variable X is given by the following table

    X -1 0 1/2 1
    PX(x) 1/8 1/8 1/4 1/2


    Q: Let Y = X^2, calculate the standard deviation of Y
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  2. #2
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    Re: Could someone please help me with this

    Hey MathJack.

    Hint: Calculate E[Y^2] and E[Y]^2 and remember that SD(Y) = SQRT(Var(Y)).
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