Table 8: Comparison of the best-fit results in μm for centroid vertical gaps generated by the fixed and unfixed coordinate system best-fit matching methods.

(a)

Centroid Z gap data base Fixed cast Unfixed cast Fixed titan. Unfixed titan. 1 12.1 5.8 3.2 2.0 2 31.7 19.3 8.7 4.4 3 12.8 12.8 3.9 3.8 4 29.9 17.2 8.6 4.8 5 18.5 12.1 4.4 3.0 6 1.9 1.5 7 2.1 1.2 8 0.9 0.9 9 1.3 0.9 10 2.3 1.9

(b) Descriptive statistics

Count Mean Std. dev. Std. error Fixed cast 5 21.00 9.306 4.162 Unfixed cast 5 13.44 5.221 2.335 Fixed titan. 10 3.73 2.812 0.889 Unfixed titan. 10 2.44 1.462 0.462

(c) Paired -test: hypothesized difference = 0

Mean diff. DF t value value Fixed cast; unfixed cast 7.56 4 3.225 0.0321 Fixed titan; unfixed titan. 1.29 9 2.671 0.0256