What do we measure to determine the precision of an instrument?

Question

Quizplus · Accepted Answer

The precision of an instrument is best measured by the standard deviation of the mean measured reference value. This value tells us how much the individual measurements vary from the mean, giving us an indication of how precise the instrument is. The other options (mean measured reference value, difference between mean measured and actual value, and range of mean measured reference value) do not provide enough information on the precision of the instrument.

What Do We Measure to Determine the Precision of an Instrument