. Author manuscript; available in PMC: 2014 Jul 23.

Published in final edited form as: Proc Inst Mech Eng H. 2010;224(5):633–649. doi: 10.1243/09544119JEIM781

Table 1.

Mean and standard deviation of the drilling results

Experiment	Mean value (mm)		Standard deviation (mm)				99.9% confidence region (mm), major axis	Mean + confidence region (mm), maximum
Experiment	x	y	x axis	y axis	Major axis	Minor axis	99.9% confidence region (mm), major axis	Mean + confidence region (mm), maximum
Hannover, top side	−0.167	−0.080	0.107	0.121	0.135	0.089	0.444	0.629
Hannover, bottom side	−0.113	−0.125	0.115	0.128	0.138	0.103	0.455	0.624
Vanderbilt, top side	0.562	0.105	0.077	0.041	0.082	0.031	0.268	0.840
Vanderbilt, bottom side	0.477	−0.087	0.116	0.088	0.124	0.076	0.408	0.893