Table 2.

Optimal Pooling Size and Fraction of Tests Required, Relative to Individual Testing, for Two Pooling Methods

	Optimal Pool Size (% of Tests Required)
	β=0		β=.05
π	Dorfman	One Step	Dorfman	One Step
.2	3 (82.1)	4 (93.1)	3 (84.7)	4 (94.7)
.1	4 (59.4)	5 (60.9)	4 (62.7)	5 (62.6)
.05	5 (42.6)	8 (40.6)	5 (46.5)	7 (41.6)
.01	11 (19.6)	14 (16.0)	11 (24.0)	15 (16.9)
005	15 (13.9)	20 (11.0)	15 (18.5)	21 (11.6)
.001	32 (6.3)	45 (4.7)	33 (11.1)	47 (5.1)
.0005	45 (4.5)	63 (3.3)	46 (9.3)	66 (3.6)
.0001	100 (2.0)	142 (1.4)	103 (6.9)	149 (1.6)