How to calculate the Accuracy ?

Accuracy:  

• Is also called "Precision".
• It means the quality or state of being correct or precise.
• It is calculated as follows.

                  Accuracy or Precision = Measured value / Theoretical value   X 100%

Example  :

   20 µl  = 20 mg  (or) 20000ug ( or) 0.02g

           

         1.       19.8 µl

         2.       19.6 µl

         3.       19.7 µl

         4.       19.9 µl

Average (Mean )  = 19.75 µl

19.75 µl = 19.75 mg

=20-19.75/20 X 100

= 20-19.75 = 0.25     0.25/20  X 100 = 1.25

=100-1.25 =98.75

Accuracy  value must be   99 to 101 %