Table 4 Statistical comparison of repeated measurements
Humidity setting (%) | Mean and standard deviation | Number of measurements | ||
|---|---|---|---|---|
Four-terminal measurement | Two-terminal measurement | |||
Current (nA) | Potential difference (mV) | Resistance (Rmeasured) (Ω) | ||
40 | 1.06 ± 0.06 | 166.9 ± 14.4 | (1.36 ± 0.02) × 1011 | 6 |
50 | 1.03 ± 0.05 | 91.0 ± 23.2 | (5.27 ± 0.97) × 1010 | 33 |
60 | 1.05 ± 0.04 | 45.4 ± 12.8 | (1.36 ± 0.62) × 1010 | 43 |
70 | 1.06 ± 0.04 | 26.8 ± 11.0 | (3.20 ± 1.48) × 109 | 39 |
80 | 1.09 ± 0.08 | 1.62 ± 5.94 | (1.86 ± 1.20) × 108 | 94 |
90 | 937 ± 1 | 1152 ± 368 | (5.53 ± 2.25) × 107 | 24 |