TABLE 4. Results of t-tests assuming unequal variances.

	T-tests Assuming Unequal Variances
	Species	Measurement	t Stat	t-critical values	P-value
	Paramylodon harlani	Width	6.87	1.65-1.98	<0.001
		Depth	-2.93	1.65-1.98	0.002
	Smilodon fatalis	Length	8.73	1.65-1.96	<0.001
		Width	-14.48	1.65-1.96	<0.001
	Panthera atrox	Length	1.37	1.65-1.97	0.08
		Width	-1.07	1.65-1.97	0.14
	Equus occidentalis	Length	21.79	1.65-1.97	<0.001
		Depth	-21.93	1.65-1.97	<0.001
	Bison antiquus	Length	-12.84	1.65-1.97	<0.001
		Width	23.06	1.65-1.97	<0.001
		Depth	-1.49	1.65-1.97	0.068