Table 2.

The variance of the amplification factor in each cluster.

	Usaite.snf1	Usaite.snf4	Usaite.snf1.4	Griffin	Ideker	Washburn
Within/Total	0.27	0.09	0.27	0.13	0.39	0.20
Between/Total	0.73	0.91	0.73	0.87	0.61	0.80
F-test (B/W)	2.70	10.06	2.75	6.63	1.54	4.09
p-value	0.001	1E-06	4.5E-5	0.015	0.55	2E-5