Both are precise, but in different contexts.
An ounce is a smaller measure so 6 oz has a greater absolute precision. On the other hand, 320 is accurate to 2 significant figures so 320 lbs has greater relative precision.
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What determines how precise a measurement is
It is precise if it is repeatable.
tenth of a gram
Is as exact as possible
The precise measurement is 5.7 mm for the first value and 3.6 m for the second value.
What determines how precise a measurement is
It is precise if it is repeatable.
The measurement 25.81 is precise to the nearest hundredth.
320lb = 145.1kg
No. Accurate relates to how close the actual measurement the instrument measures. Precise relates to how much detail the instrument gives when measuring. They are independent to each other: An measurement can be precise and accurate (eg the value of π is 3.141592654) An measurement can be precise and inaccurate (eg the value of π is 1.733677432) An measurement can be less precise and accurate (eg the value of π is 3.14) An measurement can be less precise and inaccurate (eg the value of π is 1.73).
measuring tape
An automatically measurement has a higher precision than a manually measurement.
145.5kg = 320lb 12.4oz
19.2cm is more precise
The precision of a measurement can be determined by looking at the number of decimal places in the measurement. The more decimal places, the more precise the measurement. Additionally, if a measuring tool is capable of measuring smaller increments, it can provide a more precise measurement.
tenth of a gram
Is as exact as possible