Table 6.

Test 4 results from extrapolation testing using the Wilcoxon signed-ranks sum test.^a Over- or underestimation of extrapolated ln C(t) values for five fit methods. Note that Tk-GV extrapolated best

Fit type	Wilcoxon test probability	Median differencea	Median difference 95% confidence intervals
E 2	0.0046	−0.0383	−0.0634 to −0.0140
E 2 b	0.0071	−0.0373	−0.0629 to −0.0118
GV	0.2446	0.0131	−0.0088 to 0.0491
GVc	0.7638	0.0039	−0.0158 to 0.0334
Tk-GV	0.9087	−0.0011	−0.0192 to 0.0217

^aThis does not always agree in sign with a sign difference

^bConstrained fit: , for

^cConstrained fit: for