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The Chemical Educator
ISSN: 1430-4171 (electronic version)
Abstract Volume 9
Issue 2 (2004) pp 80-88
Estimating Precision in Derived Quantities
Robert de Levie
Chemistry Department, Bowdoin College, Brunswick ME, 04011,
rdelevie@bowdoin.edu
Received July 21, 2003. Accepted September 28, 2003.
Published online: 16 March 2004
Abstract. The estimation of the precision of derived quantities is discussed. Both the propagation of imprecision and the display of imprecision contours require the use of either orthogonal polynomials or, more conveniently, the covariance matrix. The necessary expressions are given as well as illustrations of their use. Macros are available to facilitate the application of these methods on Excel spreadsheets.
Key Words: In the Classroom; analytical chemistry; computers
(*) Corresponding author. (E-mail: rdelevie@bowdoin.edu)
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Issue date: April
1, 2004
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