A student measured the density of an unknown liquid four times and obtained the values:
1.3 g/mL, 1.2 g/mL, 1.9 g/mL, 1.4 g/mL.
The relative range of these values is
a. 0.7%, precise
b. 50%, precise
Oc. 0.7%, imprecise
O d. 50%, imprecise
% and the measurements may be considered