Both accuracy and precision reflect how close a measurement/test is to an actual value, but accuracy reflects how close a measurement/test is to a known or accepted value, while precision reflects how reproducible measurements/tests are, even if they are far from the accepted value.
You can think of accuracy and precision in terms of hitting a bullseye. Accurately hitting the target means you are close to the center of the target, even if all of the marks are on different sides of the center. Precisely hitting a target means all the hits are closely spaced, even if they are very far from the center of the target.
And I agree it should not be asked here?
