Table 1. Power/type-I error of various implementations of the $T_X$ statistic.

	Input	Proportion-of-lineages estimator		Waiting-time estimator		Lineages-remaining estimator
		${\chi }^2$ distribution	Permutation distribution	${\chi }^2$ distribution	Permutation distribution	${\chi }^2$ distribution	Permutation distribution
Neutral	True trees	0.053	0.054	0.030	0.060	0.061	0.064
	RENT+	0.17	0.08	0.31	0.04	0.11	0.09
Selection, 0.02 coalescent units ago–now	True trees	1	1	0.033	0.060	0.194	0.222
	RENT+	—	0.87	—	0.05	—	0.15
Selection, 0.04–0.02 coalescent units ago	True trees	0.969	0.954	0.035	0.065	0.058	0.084
	RENT+	—	0.37	—	0.08	—	0.02

Power/type-I error (at the 0.05 level) of various implementations of the $T_X$ statistic in the simulations shown in Figure 4 and Figure 5, with 200 chromosomes sampled in the present. Power is not shown for methods with type-I error rates $\ge \mathrm{0.1.}$ $T_X$ was computed using allele-frequency estimates $0,0.01,0.02,\dots ,0.1$ coalescent units before the present.