Accurate or Precise?

A set of observations is known to be precise when most of data points are close to each other which not necessarily implies their nearness to actual accepted value. Accuracy on the other hand measures closeness of data points to actual accepted value. Thus the above image depicts precision but not accuracy.

accuracy means the distance between the target and the point of darts, perfectly dart in the same actual point of target gives the shooter a 100% accuracy , and precise means the variation of hitting the same part near to the target repeatedly

Precision and accuracy can be more clearly distinguished by the instance in the movie shooter when the new FBI joinee explains the shooting analysis on the archbishop to her coworker

comparing with instruments, accuracy is the measurement of how close the measured value is to the true value of the physical quantity. precision is the resolution or the limit to which a measurement can be made by an observer or instrument.

Like a test Instrument. If it yields consistent results, then it is regarded as reliable or precise. but the purpose of the game is to hit the centre, which the dart failed to do so, hence it's not valid or accurate.

Tight cluster of x which inclines precision, but not accurately plotted on the center point

The precission in the above problem is about the darts hitting the board..but if we talk about accuracy, it is about the darts hitting bull's eye!!so the image talks about precision but not accuracy!!!

Accuracy is the bulls eye where precise in the board

For shots aimed at a target, accurate means the shots are close to the center. Precise means that the shots are tightly clustered and close to each other. In this example, the shots are close to each other but are far from the center. Thus, they are precise, but not accurate.