Question

Which is not used to evaluate Type-A uncertainty?

(a) Arithmetic mean

(b) Standard deviation

(c) Sensitivity coefficient

(d) Degree of freedom

I had been asked this question in final exam.

This question is from Type A Evaluation of Uncertainty in section Evaluating Uncertainty in Measurement of Engineering Metrology

Answer 1

Right answer is (c) Sensitivity coefficient

To explain I would say: The best way to evaluate Type-A uncertainty data is by calculating the arithmetic mean, standard deviation or degree of freedom. Arithmetic mean is calculated first, followed by standard deviation and degree of freedom is calculated at last.