Physical measurement and calibration

This topic tests your understanding of the ways in which a measurement device may not accurately reflect the actual physiological situation. 

The ability of a measurement device to match the actual value of the quantity being measured. 

The reproducibility of repeated measurements and a measure of their likely spread. 

In the analogy of firing arrows at a target, the accuracy would represent how close the arrow was to the bullseye, whereas the precision would be a measure of how tightly packed together a cluster of arrows were once they had all been fired. 

A fixed deviation from the true value at all points in the measured range. 

---