Answer the following question given this paragraph: 

In measuring quantities we always aim for high accuracy . Estimates that fall within the range of uncertainty for a given instrument are said to be accurate. In our previous example, all of the values between and including 52.4 mL and 53.4 mL would be considered accurate. Estimates that fall outside this range are inaccurate. Accuracy describes how close an estimate is to a known standard.


Q: What describes how close an estimate is to a known standard?


A:
accuracy