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Math Help - sufficient estimator

  1. #1
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    sufficient estimator

    If X1 and X2 are independent random variables having binomial distributions with the parameters theta and n1 and theta and n2, is (X1 + 2X2)/(n1 + 2n2) a sufficient estimator of theta?

    I don't know how to approach this
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  2. #2
    MHF Contributor matheagle's Avatar
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    Let's see your joint distribution function. Next use the factorization theorem.
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