Absolute error , Relative error and Percentage error

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Absolute error

• The absolute error is the error in measurements that is equals to the difference between absolute value and measurement value.

How to calculate absolute value

• We measures several time and take arithmetical mean of them and we get the absolute value.
• And we obtain the absolute error by subtracting the individual measurement from absolute value.
• The arithmetical mean of all absolute error is taken as final absolute error.

Relative error

• Relative error is the ratio between final absolute error and the mean of all the measurements.

Percentage error

• When the relative error is expressed in the form of percentage then it is called percentage error.