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: The smaller the [[range]] and [[uncertainty]] the greater the '''precision'''.
: '''Precision''' is achieved by [[Control Variable|controlling]] [[variable]]s so that [[reading]]s are stable over a long period of [[time]].
: A single [[reading]] may be more [[precise]] if the [[resolution]] of the [[Measuring Instrument|measuring instrument]] is higher. This is due to the [[Upper Bound|upper]] and [[Lower Bound|lower bounds]] of a single number being smaller when the number has a greater [[resolution]]. A [[ruler]] that [[measure]]s to the nearest 1cm has an [[uncertainty]] of ±5mm for each [[reading]]. A [[ruler]] that [[measure]]s to the nearest 1mm has an [[uncertainty]] of ±0.5mm, making a single [[reading]] more [[precise]].
===Accuracy vs Precision===