1. describes how close an average is to a v % Error literature or theoretical value 2. quantifies or measures how repeatable v a measurement is within a set of data preciseness 3. describes how many digits are in a measured value or final answer v precision 4. describes the repeatability of measurements v deviation 5. quantifies or measures how close a measurement or average is to a accuracy literature or theoretical value 6. the difference between a measurement v error or an average of a set of measurements and a literature value %RAD 7. the difference between a measurement and the average of a set of measurements