Expressing the Uncertainty (Reproducibility) in Measured Quantities Using Significant Figures
Consider the measurement 26.78 mL
1.the implied precision is ± 0.01 mL
2.the significant figures are the digits known precisely
( i.e. 2 , 6, and 7;
these digits are known with a high degree
of confidence)
plus
the last digit (8)
which is estimated or is approximate.