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Table 5 Statistical comparison of estimated resistivity in repeated measurements

From: A procedure for stable electrical measurements on a rock sample against high contact resistance as a prerequisite for electrical tomography

Humidity setting (%) Mean and standard deviation Number of estimated values
Absolute humidity (g/m3) Estimated resistivity (Ω m)
40 11.9 ± 0.6 (1.0 ± 0.1) × 107 6
50 15.0 ± 0.6 (5.7 ± 1.4) × 106 33
60 17.9 ± 0.3 (2.7 ± 0.6) × 106 41
70 20.3 ± 0.5 (1.7 ± 0.4) × 106 38
80 23.6 ± 0.7 (1.4 ± 1.0) × 105 68
90 27.5 ± 0.8 (7.6 ± 2.0) × 104 23
  1. Any data outside the range of (mean) ± 3 × (standard deviation) were removed as outliers, and the statistics were recalculated