Earth, Planets and Space

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
Humidity setting (%)	Absolute humidity (g/m³)	Estimated resistivity (Ω m)	Number of estimated values
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

Any data outside the range of (mean) ± 3 × (standard deviation) were removed as outliers, and the statistics were recalculated

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