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    Re: Raw data for bubble
    From: Peter Fogg
    Date: 2007 Mar 9, 13:30 +1100

     Alex wrote:
    
    > > (Bill: this is a  good example of how averaging works:
    > > the individual results are so-so (as shown by the sigma)
    > > but the average is excellent).
    
    Taking a series of observations with random error, isn't the size of
    the average related to the volume? Given enough data the average
    error, if random, should trend towards zero? The average seems to tell
    us little except that a great number of sights have been considered.
    And that there does not seem to be significant systematic error.
    
    It would seem that the more important indicator here is the standard
    deviation. It would seem to indicate significant random error.
    
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