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To check the precision of an instrument its apparent measurement must be compared to a known measurement. The difference between the measured quantity divided by the known quantity is expressed as a % precision of the instrument, or calibration. Most instruments when being calibrated are tested against multiple known quantities throughout the range of the instrument. Thus the precision of the instrument is determined throughout it's full range of measurement.

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Q: How do you find the precision of measurements?

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The precision of a calculated answer is limited by the least precise measurements used in the calculation.

The precision of a calculated answer is limited by the least precise measurements used in the calculation.

Which of these sets of measurements shows the greatest precision?

the precision of the least precise measuement

the precision of the least precise measuement

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The precision of a calculated answer is limited by the least precise measurements used in the calculation.