A group of physics students perform experiments to determine the molar gas constant, RRR. The accepted database value for this constant is 8.31 J K-1 mol-1.
Which of the following experimental values is the best in terms of both accuracy and precision?
(8.22±0.15) J K−1 mol−1(8.22 \pm 0.15)\text{ J K}^{-1}\text{ mol}^{-1}(8.22±0.15) J K−1 mol−1
(8.15±0.05) J K−1 mol−1(8.15 \pm 0.05)\text{ J K}^{-1}\text{ mol}^{-1}(8.15±0.05) J K−1 mol−1
(8.48±0.05) J K−1 mol−1(8.48 \pm 0.05)\text{ J K}^{-1}\text{ mol}^{-1}(8.48±0.05) J K−1 mol−1
(8.33±0.05) J K−1 mol−1(8.33 \pm 0.05)\text{ J K}^{-1}\text{ mol}^{-1}(8.33±0.05) J K−1 mol−1