Footnotes
...hours
For most jobs the time limit was 12 hours, but a few jobs (less than tex2html_wrap_inline626) were allowed to run 24 hours or longer by special permission. The time limits at 12 and 24 hours account for the spikes in the curve.
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...median
We calculated median values by estimating the parameters of each distribution and calculating the median of the model distribution. We have found that these estimates are more robust than conventional medians, but overall the values are similar and show the same trends.
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Allen Downey
Fri May 30 15:09:42 PDT 1997