Correct Answer - Option 3 :
\(1~-~\left | \frac{true~value~-~measured~value}{true~value} \right |\)
Explanation:
Accuracy:
The degree of closeness to the exact value is the accuracy of measurement or approximation.
Error:
The difference between the measurement and the exact value is the error.
The accuracy of the measurement can be expressed in terms of the error rate as follows:
Accuracy = 1 - error rate
∴ \({Accuracy~=~1~-~\left | \frac{true~value~-~measured~value}{true~value} \right |}\)
Resolution of an instrument is the smallest increment an instrument can detect and display i.e. hundredths, thousandths, millionths.
The range is the upper and lower limits an instrument can measure a value during the measurement.
The precision of an instrument is the degree of repeatability i.e. how reliably it can reproduce the same measurement over and over.
