Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Guidelines for Expressing the Uncertainty of Measurement Results Containing Uncorrected Bias

Published

Author(s)

Steven D. Phillips, K Eberhardt, B Parry

Abstract

This paper proposes a method to extend the current ISO Guide to the Expression of Uncertainty in Measurement to include the case of known, but uncorrected, measurement bias. It is strongly recommended that measurement results be corrected for bias, however, in some situations this may not be practical, hence an extension of the Guide is proposed to address this special situation. The method keeps with the spirit of the Guide in maintaining the link between uncertainty and statistical confidence. Similarly, the method maintains the transferability of one uncertainty statement to be included as a component in another uncertainty analysis. The procedure involves modifying the calculation of the expanded uncertainty, allowing it to become asymmetric about the measurement value. The method is compared to other alternative procedures, and an illustration of how it affects tolerance zones is presented.
Citation
Journal of Research of the National Institute of Standards and Technology
Volume
102(5)

Keywords

bias, error, expanded uncertainty, measurement, uncertainty

Citation

Phillips, S. , Eberhardt, K. and Parry, B. (1997), Guidelines for Expressing the Uncertainty of Measurement Results Containing Uncorrected Bias, Journal of Research of the National Institute of Standards and Technology, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=820858 (Accessed July 19, 2024)

Issues

If you have any questions about this publication or are having problems accessing it, please contact reflib@nist.gov.

Created September 1, 1997, Updated February 19, 2017