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Least Squares

  1. Jan 29, 2012 #1
    Hello,

    What are the error bars on the least squares fit line?

    recall the variables are:
    x ; y ; x^2 ; xy ; y^2 ; yi=mx+c ; d =(y-yi) ; d^2

    ---------
    is it d?

    Thanks
     
  2. jcsd
  3. Jan 29, 2012 #2
    never mind... Its solved
     
  4. Jan 29, 2012 #3
    the answer is: [itex]\sigma_y^2 = \frac{1}{N-2} \times \displaystyle \sum_i^N (y_i - A - Bx_i)^2[/itex]
     
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