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Math Help - Mean and Variance

  1. #1
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    Mean and Variance

    Hi everybody,

    I encountered this to me very confusing problem in the context of confidence intervals and pivotal quantities.

    How can I compute the mean and the variance (marked yellow) with this information below...

    Many thanks once more!
    Attached Thumbnails Attached Thumbnails Mean and Variance-pivotal-quantity-confidence-sets.jpg  
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  2. #2
    Moo
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    Re: Mean and Variance

    Hello,

    The only random stuff in \hat\theta_2 is x_i. So if you treat everything else as a constant, it's pretty easy to compute the mean and the variance !
    After that, it's just a matter of computing double sums

    Let's try it !
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  3. #3
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    Re: Mean and Variance

    Thanks, I think I found out now!
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