Question

Which option is not correct about coverage factor?

(a) It is a number which is generally larger than 1

(b) Range – 2 to 7

(c) Can be calculated by using MS excel

(d) Depends on the selected coverage probability

I have been asked this question during an online exam.

The doubt is from Expanded Uncertainty topic in division Evaluating Uncertainty in Measurement of Engineering Metrology

Answer 1

Correct answer is (b) Range – 2 to 7

The explanation is: The coverage factor generally depends upon the probability distribution type of the output measurement quantity in the measurement model and on the selected coverage probability. Its range is generally between 2 to 3, can be more for special purposes.