In metrology, measurement uncertainty is a non-negative parameter characterizing the dispersion of the values attributed to a measured quantity. The uncertainty has a probabilistic basis and reflects incomplete knowledge of the quantity. All measurements are subject to uncertainty and a measured value is only complete if it is accompanied by a statement of the associated uncertainty. Fractional uncertainty is the measurement uncertainty divided by the measured value.
Codex has guidelines on Measurement Uncertainty, CAC/GL 54-2004.
Read more about Measurement Uncertainty: Background, Random Errors and Systematic Errors, GUM Approach, Measurement Model, Propagation of Distributions, Type A and Type B Evaluation of Uncertainty, Sensitivity Coefficients, Stages of Uncertainty Evaluation, Models With Any Number of Output Quantities, Joint Committee For Guides in Metrology, Alternative Perspective
Other articles related to "measurement uncertainty, uncertainty, measurements, measurement":
... article represents the most common view of measurement uncertainty, which assumes that random variables are proper mathematical models for uncertain quantities and ... distribution might be a better model of uncertainty ... This may include situations involving periodic measurements, binned data values, censoring, detection limits, or plus-minus ranges of measurements where ...
... Given that the measurement uncertainty in the mass measured on a standard analytical balance is ±0.1 mg, the relative uncertainty in the mass of oxalic acid dihydrate would be about one part in a thousand ... However the measurement uncertainty in the mass of potassium hydrogen iodate would be five times lower, because its equivalent weight is five times higher such an uncertainty in the measured mass is negligible in ... The relative uncertainty (ur) in the measured concentration can be estimated by assuming a Gaussian distribution of the measurement uncertainties This ...
... ASME has several procedures and reports targeted at task specific uncertainty budgeting and methods for utilizing those uncertainty estimates when evaluating the measurand for compliance to ...
Famous quotes containing the words uncertainty and/or measurement:
“I think the worst thing this nation could do for humanity would be to leave any uncertainty as to our will, our purpose and our capacity to carry out our purpose.”
—Hubert H. Humphrey (19111978)
“Thats the great danger of sectarian opinions, they always accept the formulas of past events as useful for the measurement of future events and they never are, if you have high standards of accuracy.”
—John Dos Passos (18961970)