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Precise measurements are ones in which there is very little spread about the mean value.
Precision depends only on the extent of random errors – it gives no indication of how close results are to the true value.
Be careful not to confuse accuracy, precision and resolution. 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.