Table 9.

Circular statistics for bone strains from the medial aspect of the Alligator mandible

Experiment and site	75 Medial		99 Medial		102 Medial		103 Medial
Side	WS	BS	WS	BS	WS	BS	WS	BS
No. of observations	30	48	20	10	47	35	15	27
Mean vector (μ)	113.66°	111.33°	86.855°	134.901°	84.21°	165.116°	99.913°	99.373°
Length of mean vector (r)	0.994	0.918	0.302	0.997	0.634	0.988	0.064	0.999
Median	112.99°	111.335°	95.02°	135.22°	92.36°	164.04°	93.55°	99.26°
Concentration	90.202	6.401	0.634	109.854	1.655	43.003	0	879.798
Circular variance	0.003	0.041	0.349	0.002	0.183	0.006	0.468	2.84E-04
Circular standard deviation	3.025°	11.829°	44.322°	2.326°	27.362°	4.394°	67.173°	0.966°
Standard error of mean	0.552°	1.705°	14.636°	0.866°	4.08°	0.743°	*	0.186°
95% Confidence interval	112.577°	107.987°	58.163°	133.204°	76.21°	163.66°	*	99.009°
(−/+) for μ	114.743°	114.673°	115.548°	136.598°	92.209°	166.572°	*	99.738°
99% Confidence interval	112.237°	106.936°	49.15°	132.671°	73.698°	163.203°	*	98.894°
(−/+) for μ	115.083°	115.724°	124.561°	137.132°	94.721°	167.03°	*	99.852°
Rayleigh test (Z)	29.667	40.475	1.826	9.934	18.876	34.186	0.061	26.969
Rayleigh test (P)	1.81E-12	< 1E-12	0.162	< 1E-12	2.35E-09	< 1E-12	0.942	2.09E-11
Watson's U² test (U²)	0.15	2.292	0.112	0.048	0.556	0.361	*	0.186
Watson's U² test (P)	< 0.025	< 0.005	< 0.005	> 0.5	< 0.005	< 0.005	*	< 0.005
Test for WS/BS differences
W	8.422		12.759		64.427		5.66E-04
P	0.015		1.00E-03		< 1E-12		9.81E-01
Circular-linear correlation
r	0.559	0.593	0.698	0.998	0.462	0.700	0.972	0.668
P	0.378	0.454	0.080	0.537	0.271	0.091	0.349	0.244

^*Indicates a result could not be calculated.