William M. Briggs

Statistician to the Stars!

We had turkey for Thanksgiving…

Others had ham:


  1. Mr. Briggs,

    I have a question that is OT.

    On Cryosphere Today, they chart the 1979-to-date data against a 1979-2000 mean. Is this a correct way to use a mean, considering that we are now at the end of 2008? Should the mean be recomputed as each day goes by to keep it up-to-date?


    Thank you,

  2. Briggs

    December 1, 2008 at 4:22 am


    Well, that’s the way it’s always done. The latest thirty-year period ending on a decade. Harmless as long as you keep in mind what’s going on.

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