Assignment of Uncertainty

1 Page 1 SOP 29 – 2019 Page 1 of 11 This publication is available free of charge from: https://doi.org /10.6028/NIST.IR .6969 - 2019 SOP 29 Standard Operating Procedure for the Assignment of Uncertainty 1 Introduction Purpose Lab... Open at page → 2 Page 2 SOP 29 – 2019 Page 2 of 11 This publication is available free of charge from: https://doi.org /10.6028/NIST.IR .6969 - 2019 4) Convert uncertainty components to standard uncertainties in units of the measurement result;... Open at page → 3 Page 3 SOP 29 – 2019 Page 3 of 11 This publication is available free of charge from: https://doi.org /10.6028/NIST.IR .6969 - 2019 is identified as a standard uncertainty, u, when determined using Type B methods of evaluation (... Open at page → 4 Page 4 SOP 29 – 2019 Page 4 of 11 This publication is available free of charge from: https://doi.org /10.6028/NIST.IR .6969 - 2019 however, adequate degrees of freedom and analysis of l aboratory measurement assurance check sta... Open at page → 5 Page 5 SOP 29 – 2019 Page 5 of 11 This publication is available free of charge from: https://doi.org /10.6028/NIST.IR .6969 - 2019 standard.) There are also circumstances where both approaches are used to combine uncertainties... Open at page → 6 Page 6 SOP 29 – 2019 Page 6 of 11 This publication is available free of charge from: https://doi.org /10.6028/NIST.IR .6969 - 2019 Uncertainty components associated with observed bias are not required to be included in the unce... Open at page → 7 Page 7 SOP 29 – 2019 Page 7 of 11 This publication is available free of charge from: https://doi.org /10.6028/NIST.IR .6969 - 2019 3.2.5.2.1 Estimate the combined uncertainty without considering the relevant bias. 3.2.5.2.2 Eva... Open at page → 8 Page 8 SOP 29 – 2019 Page 8 of 11 This publication is available free of charge from: https://doi.org /10.6028/NIST.IR .6969 - 2019 value is chosen and u d (uncertainty for differences) is calculated as follows, where d is the b... Open at page → 9 Page 9 SOP 29 – 2019 Page 9 of 11 This publication is available free of charge from: https://doi.org /10.6028/NIST.IR .6969 - 2019 if the component is not treated as a rectangular distribution (e.g., a meniscus may be treated a... Open at page → 10 Page 10 SOP 29 – 2019 Page 10 of 11 This publication is available free of charge from: https://doi.org /10.6028/NIST.IR .6969 - 2019 provided in the Guide to the Expression of Uncertainty in Measurement (See Appendix A). A situa... Open at page → 11 Page 11 SOP 29 – 2019 Page 11 of 11 This publication is available free of charge from: https://doi.org /10.6028/NIST.IR .6969 - 2019 Appendix A Value of tp (ν) from the t -distribution for degrees of freedom ν that defines an in... Open at page →