Table 1.

Example of data arrangement for staircase analyses (external hexagon interface)

Applied forces in newtons	Force level (i)	# of failures (nI)	i nI	i2 nI
65	5	1	5	25
60	4	4	16	64
55	3	6	18	54
50	2	1	2	4
45	1	1	1	1
40	0	0	0	0
		n=13	A=42	B=148

n=Σ n^I , A=Σ in^I, B=Σ i²n^I