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Chapter 1.7 - The Reliability of a Measurement
Principles of Chemistry - A Molecular Approach, 2nd Edition by Nivaldo J. Tro
6
Chemistry
Undergraduate 1
09/29/2012

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Term
what are significant figures?
Definition

o   the non-place-holding digits

Term
what are exact numbers?
Definition

o   no uncertainty, no limit to the number of significant figures in any calculation

Term
what is accuracy?
Definition

o   how close the measured value is to the actual value

Term
what is precision?
Definition

o   how close a series of measurements are to one another or how reproducible they are

Term
what is random error?
Definition

o   equal probability of being too high or too low

Term
what is a systemmatic error
Definition

– error that tends to be either too high or too low

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