Statistics and Other Things

Since the initial publication of the “hockey sticks” by Michael Mann and members of his self-described “team,” there has been controversy over the methodology used in the studies and the reliability of the results.  The subsequent history is well known.

Papers were published by Steve McIntyre and Ross McKitrick showing that the centering methods used in the Mann papers produced statistically biased results.  Questions were raised about the proxies used and it became evident that one could produce similar “temperature” series by utilizing certain types of artificially generated random series rather than physical proxies which purportedly were related to the temperatures.  This eventually led to a congressional hearing to establish whether the M & M criticism was valid.  Prof. Edward Wegman was commissioned to produce a report examining the various claims.

For further discussion , it is important to understand the makeup of the contents of this report:

Executive summary (5…

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