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Homework Help: Quick question

  1. Apr 4, 2006 #1
    the following post probably isn't going to be so cohesive, bear with me anyway: I'm completing a report and need to combine several sets of results for the same experiment and combine their errors to give a best value - can't for the life of me remember the formulae, i know roughly what it is - sum of the squares of the values over the squares of their error, all over the square of their error...

    anyway, thanks as usual! :biggrin:

    Posting/reading on this forum should become compulsory for all undergrads, its helpful.
     
  2. jcsd
  3. Apr 4, 2006 #2

    Meir Achuz

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    For values y_i with errors d_i:
    <y>=Sum[y_i/d_i^2]/Sum[1/d_i^2].
    The resulting error is 1/D^2=Sum[1/d_i^2].
     
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