ac·cu·ra·cy

/ˈækjərəsi/ noun

1 : freedom from mistake or error : the quality or state of being accurate : ↑correctness

[noncount]

Each experiment is performed twice to ensure accuracy.

The police questioned the accuracy of his statement.

He could not say with any accuracy what he had seen.

[singular]

She shot free throws with an accuracy of 80 percent. [=80 percent of her free throws were accurate/successful]

2 [noncount] : the ability to work or perform without making mistakes

Several managers have tried to increase the speed and accuracy of the workers.