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Math Help - Need urgent help on Stat Question

  1. #1
    Junior Member
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    Need urgent help on Stat Question

    We know that for any random variable Y, the variance of Y is defined as
    σY2 = E(Y-E(Y))2 = E(Y2) [E(Y)]2

    a) Apply this formula to the sample mean of a random sample of size n from a population with mean μ and variance σ2, and show that
    E( 2) = μ2 + σ2/n


    Thanks guys
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  2. #2
    GAMMA Mathematics
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