What is the difference between 'precision' and 'accuracy'?

Question

What is the difference between \'accurate\' and \'precise\' ?

If there is a difference, can you give an example of

• a number that is accurate but not

Answer 1

Assume the exact time right now is 13:01:03.1234

• Accurate but not precise - it's 13:00 +/- 0:05
• Precise but not accurate - it's 13:15:01.1425
• Accurate and precise - it's 13:01:03.1234