   field  resistivity  hall_resistivity  resistivity_error  hall_resistivity_error
0      0    3.773e-08                 0          4.545e-11               9.161e-11
1      1    3.787e-08         3.579e-10           3.25e-11                6.55e-11
2      2    3.803e-08         9.475e-10           3.25e-11                6.55e-11
Hall sign agrees: True
...and with the Hall sign flipped: False
against the truth: χ²/n = 0.87 (ρ_xx), 1.30 (ρ_H)
