Discussion
A test result quoted without an uncertainty is
Answer: B
Correct answer: of limited value, since its agreement with the limit cannot be judged
A test exists to establish whether the machine meets a specification, and that judgement requires knowing how well the measurement is known. A temperature rise of 78 degrees against an 80 degree limit passes if the uncertainty is one degree and is undecided if it is five. Calibration alone does not supply that figure.
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