2.8. Two groups of students measure the charge of the electron and report their results as follows:
Group A: e = (1.75 ± 0.04) × 10⁻¹⁹ C
and
Group B: e = (1.62 ± 0.04) × 10⁻¹⁹ C.
What should each group report for the discrepancy between its value and the accepted value,
e = 1.60 × 10⁻¹⁹ C
(with negligible uncertainty)? Draw an illustration similar to that in Figure 2.2 to show these results and the accepted value. Which of the results would you say is satisfactory?