A measurement result is considered accurate if it is judged to be close to the true value. Accuracy is how close to the true value a reading is;
precision is a measure of reproducibility - how close together your results are - how much random variation they have;
resolution is the smallest change detectable with your equipment
Be careful not to confuse accuracy, precision and resolution. In essence: Accuracy is how close you can get to the correct result whereas precision is how consistently you can get that result
Once you've watched this video take another look a the diagram above - it should start to make a lot more sense.
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