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AP Statistics help?

  1. Nov 19, 2004 #1
    I need some help understanding sampling distributions. Here's the Q:

    Prepare the sampling distribution x-bar of a random sample of n=2 drawn without replacement from a finite population of size n=5, whose elements are the numbers 3,5,7,9,11. Is the mean (mu x-bar) and unbiased estimator of mu?

    So far I figured E(x-bar)=7. But I'm not sure how to determine the rest? Is there a formula I need for unbiased estimators?

    I know there aren't too many taking AP stat out here, so ANY help would be great!! :smile:
  2. jcsd
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