Re: What is the exact value of a mole?

dgenglish_at_hotmail.com
Date: 12/28/04 

Date: 28 Dec 2004 04:45:44 -0800

10.0 +/- 0.2 and 9.9 +/- 0.3 as independent measures of the same
value are arguable consistent results. But they aren't identical
results. 9.9 +/- 0.3 sets a different lower bound for the
statistically probable true value of this measurement. If seven other
labs independently determine the measured value to be 9.4 +/- 0.3, this
set of results is consistent with the second result (9.9 +/- 0.3) but
not the first (10.0 +/- 0.2). In this situation, one would have reason
to question whether the first result (10.0 +/- 0.2) was in error.

Dave

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