Measurement is a process of comparing an unknown quantity with a standard quantity . No measurement can be made with perfect accuracy which results in the occurance of the errors.
There are two types of error,
- Absolute error
- Percentage error
Absolute error:
Absolute error may be defined as the difference between the variable and measured value of the variable it can be expressed as e=yn-xn
Where, e = absolute error
Yn= expected value
Xn = measured value
Percentage error
Percentage error = absolute error*100/expected error
Where, A = yn-xn*100/yn