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In order to help illustrate
the problem with sig figs, I showed them one of John Denker's graphs as
a way of explaining the limitation. The graph was a Gaussian
distribution of 3.8675309 ± 0.1 using all of the digits vs. rounding
to tenths vs. rounding to hundredths. (I looked for it on av8n.com, but
it looks like John has since edited the page it appeared on, and the
graph is no longer there.) One of my students looked at the number and
blurted out, "Oh my God! Jenny!"