Table 7. Calculated likelihood that the four theropod dinosaurs Troodon formosus, Byronosaurus jaffei, Citipati osmolskae, and Machairasaurus philoceratops show each parental care strategy.

Care Strategy	Sum of Squares	AIC	Δi	Relative likelihood	Wi	Evidence ratio
No Care	0.491	0.573	4.504	0.105	0.062	9.50
Maternal Care	0.261	-1.321	2.610	0.271	0.161	3.69
Paternal Care	0.110	-3.931	0	1.000	0.592	1.00
Biparental Care	0.238	-1.064	2.327	0.312	0.185	3.20