Table 7 Axial analysis of alignment during urination in all females (pooled data and mean vectors of particular dogs sorted into three categories according to the relative changes of magnetic field declination)
From: Dogs are sensitive to small variations of the Earth’s magnetic field
Pooled raw data | Means per dog (n ≥ 5) | |||||
|---|---|---|---|---|---|---|
Declination rate | 0% | 0.1-2% | >2% | 0% | 0.1-2% | >2% |
Number of observations | 603 | 396 | 703 | 27 | 20 | 29 |
Mean vector (μ) | 5°/185° | 2°/182° | 11°/191° | 0°/180° | 7°/187° | 23°/203° |
Length of mean vector (r) | 0.208 | 0.131 | 0.068 | 0.434 | 0.159 | 0.134 |
Circular standard deviation | 51° | 58° | 66° | 37° | 55° | 57° |
95% Conf. interval (-/+) for μ | 357°-12° | 347°-17° | 349°-33° | 163°-196° | 312°-63° | 328°-78° |
99% Conf. interval (-/+) for μ | 354°-15° | 342°-22° | 342°-40° | 157°-201° | 294°-80° | 311°-95° |
Rayleigh test (Z) | 26.146 | 6.839 | 3.251 | 5.085 | 0.503 | 0.52 |
Rayleigh test (p) | 4.41⋅10-12 | 0.001 | 0.039 | 0.005 | 0.61 | 0.598 |
Rao’s spacing test (U) | 312.836 | 330 | 339.004 | 156.975 | 135.002 | 129.554 |
Rao’s spacing test (p) | <0.01 | <0.01 | <0.01 | >0.05 | >0.1 | >0.5 |