Metrology
Metrology
Is the science of measurement and its applications See the “Introduction” tab of this sheet
is the traffic science of the metropolitan
when mastered well gives reliable results See the “Introduction” tab of this sheet
does not concern research laboratories but only routine and control laboratories
It is essential to give a result with its uncertainty to discuss and interpret the test result.
False
True See the “A little theory”/“Uncertainty” tabs of this sheet
If Z is the value measured for a reference value X, and U is the uncertainty of this measurement, the uncertainty interval of the measurement is:
Z +/- X
Z +/- U See the “A little theory”/“Uncertainty” tab
X +/- U
X +/- Z
The accuracy of a measurement (fidelity in metrology) is estimated by repeated measurements of the same object or similar object under specified conditions.
True See the “A little theory”/“Uncertainty” tab
False
Fidelity accounts for…
random error(s) See the “A little theory”/“Precision” tab
systematic error(s) attributable to the laboratory and not to the measurement method
Accuracy accounts for…
random error(s)
systematic error(s) attributable See the “A little theory”/“Accuracy” tab
Accuracy is…
The difference between the measurement (or the average of the measurements) and the true value of the sample See the “A little theory”/“Accuracy” tab and the “Illustrating theory” tab
The dispersion of the results around the average value of the measurements
There are two types of bias: laboratory bias and method bias.
True See the “A little theory”/“Accuracy” tab and the “Bias” tab
False
Bias accounts for….
random error(s)
systematic error(s) See the “A little theory”/“Bias” tab and the “Illustrating theory” tab
The bias related to the lab can be exposed by…
interlaboratory tests See the “Illustrating theory” tab
the repetition of the measure