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Table 1

Pearson and Spearman correlation coefficients cP and cS for N vs. vslip and Q/ 2 vs. vslip.

Spline interpolation            cP    cS

Line A N vs. vslip        0.998 0.996
Q/ 2 vs. vslip        0.932 0.969

Line B N vs. vslip        0.987 0.935
Q/ 2 vs. vslip        0.934 0.923

Linear interpolation            cP    cS
Line A N vs. vslip        0.997 0.997
Q/ 2 vs. vslip        0.913 0.922

Line B N vs. vslip        0.964 0.976
Q/ 2 vs. vslip        0.842 0.805

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