Table 1.

Summary of the estimated fatigue parameters of the Materials S and PC using different models and the proportion of the specimens failing at lower stress than predicted by each model.

			Material S			Material PC
Calculation Method	Stress Rate Groups	Stress Rate	Below Predicted (%)	n	ln B	Below Predicted (%)	n	ln B
All points	All four rates	Actual	48.3	35.9	-11.1	34.2	12.4	9.61
		Target	48.3	35.5	-10.8	34.2	12.4	9.61
	Two middle rates	Actual	49.2	24.4	-4.87	46.7	6.8	13.3
		Target	49.2	24.6	-4.84	46.7	6.8	13.3
	Two extreme rates	Actual	50.0	37.8	-11.9	35.0	13.5	9.21
		Target	50.8	37.3	-11.5	35.0	13.5	9.21
Median points	All four rates	Actual	46.7	38.4	-12.7	54.2	13.1	10.4
		Target	46.7	38.2	-12.4	54.2	13.1	10.4
	Two middle rates	Actual	45.0	23.6	-4.86	57.5	8.2	13.6
		Target	45.0	23.7	-4.79	57.5	8.2	13.6
	Two extreme rates	Actual	53.3	41.1	-13.3	46.7	14.0	9.61
		Target	53.3	40.9	-13.1	46.7	14.0	9.61
Homologous points	All four rates	Actual	48.3	32.8	-9.84	33.0	13.7	8.63
		Target	47.5	32.6	-9.59	33.0	13.7	8.63
	Two middle rates	Actual	48.3	20.5	-2.87	33.0	12.6	8.92
		Target	49.2	20.6	-2.79	33.0	12.6	8.92
	Two extreme rates	Actual	48.3	35.5	-11.1	36.6	13.8	8.99
		Target	47.5	35.2	-10.9	36.6	13.8	8.99