GPS Accuracy-statistics

Device	Count	Trueness (Average Distance Error)	Standard Deviation (From mean)	Standard Deviation (From true)	Average Pace Error
					(from 9:00 min/mile)	(from 5:30 min/Km)
Footpod (calibrated)	3635	0.18% (9.3 Ft/Mile, 1.8 m/Km)	2.34% (123.6 Ft/Mile, 23.4 m/Km)	2.35% (123.9 Ft/Mile, 23.5 m/Km)	0:13	0:08
Garmin 910XT with Footpod	725	1.83% (96.9 Ft/Mile, 18.3 m/Km)	3.05% (161.1 Ft/Mile, 30.5 m/Km)	3.56% (188.0 Ft/Mile, 35.6 m/Km)	0:19	0:12
Garmin 205	1122	1.42% (75.1 Ft/Mile, 14.2 m/Km)	3.51% (185.4 Ft/Mile, 35.1 m/Km)	3.79% (200.0 Ft/Mile, 37.9 m/Km)	0:20	0:13
Garmin 310XT with Footpod	3635	2.38% (125.9 Ft/Mile, 23.8 m/Km)	3.66% (193.4 Ft/Mile, 36.6 m/Km)	4.37% (230.8 Ft/Mile, 43.7 m/Km)	0:24	0:14
Footpod (uncalibrated)	3635	2.50% (132.2 Ft/Mile, 25.0 m/Km)	3.83% (202.5 Ft/Mile, 38.3 m/Km)	4.58% (241.8 Ft/Mile, 45.8 m/Km)	0:25	0:15
Garmin 610	2043	3.28% (173.0 Ft/Mile, 32.8 m/Km)	3.51% (185.3 Ft/Mile, 35.1 m/Km)	4.80% (253.6 Ft/Mile, 48.0 m/Km)	0:26	0:16
iPhone 4s	951	3.17% (167.6 Ft/Mile, 31.7 m/Km)	3.66% (193.0 Ft/Mile, 36.6 m/Km)	4.84% (255.7 Ft/Mile, 48.4 m/Km)	0:26	0:16
Garmin 310XT no Footpod	1945	3.00% (158.5 Ft/Mile, 30.0 m/Km)	4.22% (222.6 Ft/Mile, 42.2 m/Km)	5.18% (273.3 Ft/Mile, 51.8 m/Km)	0:28	0:17
Polar RC3 GPS	1433	2.41% (127.4 Ft/Mile, 24.1 m/Km)	4.61% (243.7 Ft/Mile, 46.1 m/Km)	5.21% (275.0 Ft/Mile, 52.1 m/Km)	0:28	0:17
Garmin Fenix 2	1493	2.47% (130.3 Ft/Mile, 24.7 m/Km)	5.91% (312.0 Ft/Mile, 59.1 m/Km)	6.40% (338.2 Ft/Mile, 64.0 m/Km)	0:35	0:21
Garmin 10	1020	8.54% (450.7 Ft/Mile, 85.4 m/Km)	4.54% (239.9 Ft/Mile, 45.4 m/Km)	9.67% (510.8 Ft/Mile, 96.7 m/Km)	0:52	0:32
Garmin 620	2115	8.35% (440.8 Ft/Mile, 83.5 m/Km)	5.11% (269.6 Ft/Mile, 51.1 m/Km)	9.79% (516.8 Ft/Mile, 97.9 m/Km)	0:53	0:32