Table 1.

Least-squares regressions of ln(brain mass) residuals versus ln(basal metabolic rate) residuals in mammals. (Significant correlations are shown in bold face. Note that Artiodactyla, Soricidae and Lagomorpha are not included in the analysis. Within any possible group of insectivores (Eulipotyphla, Afrosoricida, or both combined), there is no significant correlation between brain mass residuals and BMR residuals.)

group	method	N	p par	slope	r2
species means	raw	313	<0.0001	0.290	0.053
	IC	312	0.005	0.149	0.026
family means		61	0.011	0.557	0.104
Altricial	raw	206	<0.0001	0.339	0.082
	IC	205	0.049	0.127	0.021
Precocial	raw	49	0.016	0.535	0.117
	IC	48	0.019	0.333	0.133
Carnivora	raw	44	0.141	0.159	0.051
	IC	43	0.124	0.192	0.054
Chiroptera	raw	58	0.032	0.244	0.080
	IC	57	0.517	−0.047	0.008
Primates	raw	23	0.0009	0.614	0.417
	IC	22	0.025	0.395	0.202
Rodentia	raw	157	0.065	0.160	0.022
	IC	156	0.103	0.136	0.018