Table 4.

Likelihood Ratio Test for Selection on Insertions in Intergenic DNA

Element class	α̂ (95% C.I.)^a	2 ΔL	r_s, model (95% C.I.)^b
Class I	0.64 (0.52, 0.70)	31.1^***	-0.178 (-0.124, -0.232)
Class II	0.27 (0.04, 0.42)	4.9^*	-0.07 (-0.01, -0.126)
Class III	0.34 (0.1, 0.49)	6.7^**	-0.085 (-0.027, -0.144)

Significance of likelihood ratio test

Maximum likelihood estimate and approximate 95% credibility interval for the estimate of α, using the χ² approximation

Mean and 95% confidence interval of the Spearman rank correlation coefficient between TE frequency and coding density from 10,000 computer simulations of random insertion using the maximum likelihood estimates of α and ν

, P <0.05

^**

, P <0.01

^***

, P <0.001