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Variance of estimator

  1. Apr 24, 2014 #1
    Hi there. I would like to ask you one question about variance of estimator.

    Suppose that [itex]Y_i=βX_i+ε_i[/itex] and β estimator is [itex]\bar{Y}[/itex] / [itex]\bar{X}[/itex].

    I calculated mean of estimator. Im not sure if it's correct, but i got that its equal to n*β. But how about variance.
    Any help would be appreciated!
     
  2. jcsd
  3. Apr 24, 2014 #2

    mathman

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    It would help if you could back up one step and define your terms.
     
  4. Apr 25, 2014 #3
    I found a solution :) Thank you.
     
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