Question 6: What determines the precision of a measurement?
Precision is the closeness of two or more than two measurements with each other if the measurements are made under similar conditions (for example, with the same instrument, temperature etc.).
Precision of the measurement highly depends upon the instrument used and its least count. In fact least count of the instrument one uses for the measurement is a vital determinant for the precision of the measurement. Measurements with smaller least count are more precise.