Sensitivity of censored data analysis to determine the characteristic value of structural timber

Journal of Wood Science

Official Journal of the Japan Wood Research Society

Table 2 Statistics of test results

	Ratio of censored data	Subtraction	Statistics	Without censored data analysis		With censored data analysis
	Ratio of censored data	Subtraction	Statistics	MLE^a	Order statistics	CMLE^b (All)	CMLE (30%)	KM method^c
Ideal datasets	0%	–	Average^d	48.6	47.6	–	–	–
			Min^e	42.0	42.0	–	–	–
			Max^f	55.3	53.2	–	–	–
Censored datasets	10%	5 MPa	Average	48.2	47.1	49.5	48.5	47.2
			Min	41.6	38.6	42.7	41.6	43.2
			Max	54.8	53.2	55.6	54.3	53.1
		10 MPa	Average	47.5	46.7	49.5	48.4	47.1
			Min	41.1	38.2	42.8	41.6	43.1
			Max	54.1	52.8	55.6	54.2	53.1
		15 MPa	Average	46.8	45.6	49.5	48.4	47.0
			Min	40.4	38.2	42.8	41.5	43.0
			Max	53.3	51.9	55.5	54.2	53.1
	20%	5 MPa	Average	47.5	46.4	51.0	48.5	48.6
			Min	41.3	42.0	43.7	42.1	43.3
			Max	54.1	51.7	58.0	55.3	56.6
		10 MPa	Average	46.2	45.9	51.0	48.3	48.5
			Min	40.2	41.8	44.1	41.9	43.3
			Max	52.6	51.4	58.0	55.2	56.6
		15 MPa	Average	44.5	45.0	50.8	48.2	48.5
			Min	38.4	37.4	44.3	41.8	43.3
			Max	50.7	50.4	57.8	55.1	56.7
	30%	5 MPa	Average	47.3	46.6	52.2	49.1	49.9
			Min	40.5	37.2	46.3	43.9	45.2
			Max	53.9	51.9	58.4	54.5	57.5
		10 MPa	Average	45.6	45.3	52.4	48.9	49.8
			Min	38.7	33.3	46.9	43.7	45.2
			Max	52.0	51.0	58.6	54.3	57.5
		15 MPa	Average	43.6	43.1	52.4	48.7	49.7
			Min	36.5	29.3	47.4	43.3	45.2
			Max	49.7	49.3	58.5	54.1	56.7
	40%	5 MPa	Average	46.9	46.3	54.6	50.6	51.9
			Min	39.5	37.6	47.5	44.1	45.7
			Max	53.6	52.7	60.1	56.2	59.5
		10 MPa	Average	44.7	44.0	54.9	50.3	51.9
			Min	36.6	34.9	48.2	43.8	45.7
			Max	51.4	51.4	60.6	55.9	59.3
		15 MPa	Average	41.5	41.5	54.5	50.1	52.0
			Min	33.0	29.9	48.6	43.4	45.7
			Max	44.9	50.1	58.2	55.6	59.2