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    Re: Rejecting outliers
    From: Gary LaPook
    Date: 2011 Jan 9, 13:09 -0800

    You have probably noticed from my prior postings, George, that I am a "pencil and paper", "approximation is close enough" kinda guy. If I wanted to use a electronics to get the greatest accuracy possible then I would just buy another GPS since they don't cost much more than a calculator.

    Anyway, Happy New Year to you and your bride and stay in out of the cold.

    gl
    --- On Sat, 1/8/11, George Huxtable <george{at}hux.me.uk> wrote:

    From: George Huxtable <george{at}hux.me.uk>
    Subject: [NavList] Re: Rejecting outliers
    To: NavList@fer3.com
    Date: Saturday, January 8, 2011, 6:10 AM

    I agree with (almost) every word from Gary LaPook in his thoughtful
    posting.

    He sets two standard deviations from the mean as the maximum acceptable
    before excluding an observation as an outlier in a set of five or six.
    Personally, I would set that threshold somewhat higher, to say 2.5 SD. And
    his data-set is so near to a straight-line that graphing a straight-line,
    then measuring offsets with dividers, though fine in principle, is somewhat
    crude, and I would prefer to calculate those offsets numerically. But
    really, there's little to separate us on those matters.

       
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