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Accuracy and precision
Accuracy is how close we can get to the actual value while precision is how much detailed our results are.E.g.-
True value-3.45678
3.455
3.458
The first one is more accurate.
Now if we have the same value measured by some other instruments which give the following data
3.45567
3.456778
The second value is more precise and more accurate in comparison to the first one.