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Table 4 Angular and axial analysis of body orientation in dogs during urination

From: Dogs are sensitive to small variations of the Earth’s magnetic field

  Urination: (all records)
Data type Angular Axial
  Pooled Means (n ≥ 5) Pooled Means (n ≥ 5)
Males M07 Females Males Females Males M07 Females Males Females
Number of observations 1,402 2,478 1,702 24 35 1,402 2,478 1,702 24 35
Mean vector (μ) 312° 298° 13° 292° 331° 154°/334° 175°/355° 5°/185° 89°/269° 11°/191°
Length of mean vector (r) 0.048 0.105 0.03 0.213 0.213 0.037 0.196 0.132 0.101 0.292
Circular standard deviation 141° 122° 152° 101° 101° 74° 52° 58° 61° 45°
95% Confidence interval (-/+) for μ 268°-356° 283°-313° 309°-78° 217°-8° 269°-34° 125°-183° 171°-179° 358°-12° 9°-169° 348°-33°
99% Confidence interval (-/+) for μ 254°-10° 278°-318° 288°-98° 193°-31° 249°-53° 116°-192° 169°-180° 356°-15° 343°-194° 341°-40°
Rayleigh test (Z) 3.215 27.075 1.517 1.088 1.584 1.875 94.735 29.524 0.246 2.99
Rayleigh test (p) 0.04 1.7410-12 0.219 0.341 0.206 0.153 < 10-12 < 10-12 0.786 0.049
Rao’s spacing test (U) 307.618 354.479 339.271 140.383 131.675 325.078 357.094 346.675 134.75 145.847
Rao’s spacing test (p) <0.01 <0.01 <0.01 >0.1 >0.1 <0.01 <0.01 <0.01 >0.1 >0.1
  1. Data for the male dog M07 are presented in a separate column due to large sample size.