Question

can some one tell me ,what is accuracy ?

Answer 1

Answer:

the quality or state of being correct or precise.

Answer 2

Answer:

In measurement of a set, accuracy is closeness of the measurements to a specific value, while precision is the closeness of the measurements to each other.

Or

the condition or quality of being true, correct, or exact; freedom from error or defect; precision or exactness; correctness. Chemistry, Physics. the extent to which a given measurement agrees with the standard value for that measurement. Compare precision (def. 6).

(Accuracy refers to the closeness of a measured value to a standard or known value.) For example, if in lab you obtain a weight measurement of 3.2 kg for a given substance, but the actual or known weight is 10 kg, then your measurement is not accurate.