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Accuracy is state of exactness. Degree of correctness

Precision is state of strict exactness.

Ex: if you weigh an object in scale if it shows reading say 10kg(original is 10 kg) all the  trials it is accurate.If it shows 9.9,9.8..etc at different trials is accurate

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Accuracy is state of exactness. Degree of correctness

Precision is state of strict exactness.

Ex: if you weigh an object in scale if it shows reading say 10kg(original is 10 kg) all the  trials it is accurate.If it shows 9.9,9.8..etc at different trials is accurate

​ if you weigh an object in scale if it shows reading say 10kg(original is 10 kg) all the  trials it is accurate.If it shows 9.9,9.8..etc at different trials is accurate.  sir what is precision in this sentence? 

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Accuracy is closeness to the true value.Precision is degree of reproducibility of measured value.eg.If we measure 5cm distance by screw guage and its showing 4.99 then its accurate and if its showing 4.90 in 5-10 repeated observations then its precision 

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The accuracy of measurement is a mesure of how close the output reading of the measurement is to the correct value.

The precision is a term that desribes an instrument's degree of freedom from random error.

HIGH precision does not imply anything about measurement accuracy.

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On 14/12/2015 at 7:36 AM, Fareed H. Ansari said:

There is no difference.

There is most definitely a difference.

Accuracy is the closeness to the desired value. Precision is the closeness to each other. You can be precise in your measurements but be precisely wrong.

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If an instrument measures dimensions or weight of an object and gives the readings very close to the actual dimension or weight of the object, it will be called accuracy of the instrument, but the difference between each reading is high then it won't be called precise instrument. So, to be precise, every reading should also be close to each other.

For Example - 

An object has 10 grams of actual weight. If a weighing balance gives readings 10.18 g, 9.89 g and 10.05g, the balance is accurate because each reading is close to the actual weight. On the other hand, it is not precise because all three readings aren't close to each other. An instrument must be both precise and accurate.

Accuracy is the degree of closeness between a measured value and the true value.

Precision is the degree of closeness between a set of measured value.

For instance, if the true length of a table is 5m, a measured value of 5.0002m is more accurate than that of 5.2m.

On the other hand, the set of measured value of 5.001m, 5.002m, and 5.003m is more precise than that of 5.1m, 5.2m, and 5.3m.

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