Table 1. Known sex of modern elephants, and predicted sex using the Rx ratio.

Sample ID	Rx ratioa	95% CIb	Known sex	Predicted sex
DS1531	0.9348111	0.9241519	Female	Female
		0.9454702
DS1548	0.4844121	0.4781392	Male	Male
		0.4906849
DS1514	0.9300965	0.9194486	Female	Female
		0.9407445
DS1543	0.4918646	0.4866054	Male	Male
		0.4971237
DS1506	0.4878141	0.4826157	Male	Male
		0.4930124
LO3503	0.9321284	0.9215853	Female	Female
		0.9426715
LO3509	0.9415045	0.9308473	Female	Female
		0.9521617
LO3511	0.9287396	0.917744	Female	Female
		0.9397352
LO3521	0.8712463	0.8574852	Female	Female
		0.8850075

^aThe Rx ratio compares DNA sequence reads that align to the X chromosome to DNA sequence reads that align to autosomal chromosomes, and would be expected to be ca. 1.0 for females and 0.5 for males.

^bThe top value represents lower bound of the 95% Confidence Intervals (CI) and the lower value represents the upper bound of the 95% CI.