Table 3.

Descriptive circular statistics for in vivo bone strain orientations recorded from intraorbital surface of postorbital septum.

Experiment	10	10	32	32	42	42	47	47
Side	Balancing	Working	Balancing	Working	Balancing	Working	Balancing	Working
n	268	240	148	37	183	117	181	107
Mean vector (μ)	132.565	121.25	36.287	14.932	167.207	134.695	141.971	65.667
Length of mean vector (r)	0.782	0.931	0.969	0.904	0.799	0.972	0.98	0.994
Median	130.328	121.378	38.827	13.765	169.729	135.729	141.687	65.788
Concentration	2.655	7.549	16.646	5.501	2.852	17.96	24.828	79.962
Circular variance	0.109	0.034	0.015	0.048	0.1	0.014	0.01	0.003
Circular SD	20.111	10.814	7.132	12.867	19.182	6.858	5.809	3.214
95% confidence interval (±) for μ	130.184	119.883	35.138	10.791	164.457	133.452	141.125	65.058
	134.947	122.617	37.436	19.072	169.957	135.938	142.818	66.276
99% confidence interval (±) for μ	129.436	119.453	34.777	9.491	163.593	133.062	140.859	64.867
	135.695	123.047	37.797	20.372	170.821	136.328	143.083	66.468
Rayleigh test (Z)	163.72	208.128	139.105	30.241	116.879	110.483	173.708	105.662
Rayleigh test (P)	< 1E-12	< 1E-12	< 1E-12	< 1E-12	< 1E-12	< 1E-12	< 1E-12	< 1E-12
Watson's U2 test (von Mises, U2)	1.041	0.306	2.581	0.095	1	0.11	0.051	0.274
Watson's U2 test (P)	< 0.005	< 0.005	< 0.005	0.1 > P > 0.05	< 0.005	0.1 > P > 0.05	0.5 > P > 0.25	< 0.005
Test for working/balancing differences
W	68.318		57.146		172.777		115.667
P	< 1E-12		< 1E-12		< 1E-12		< 1E-12