Table 16. T-Test results of tooth comparisons.

M. pacificus–M. americanum comparisons		State-to-state comparisons (n ≥ 9)
Tooth position	p	Tooth position and state pair	p	Tooth position and state pair	p
M3	p < 0.001	M3 CA–FL	p < 0.001	M3 FL–MO	p = 0.685
m3	p < 0.001	M3 CA–MO	p < 0.001	m3 CO–IN	p = 0.416
M2	p = 0.213	m3 CA–CO	p < 0.001	m3 CO–LA/MS	p = 0.909
m2	p < 0.001	m3 CA–IN	p < 0.001	m3 IN–LA/MS	p = 0.229
		m3 CA–LA/MS	p < 0.001

Note:

Columns 1 and 2 compare the M. pacificus to M. americanum L:W samples for each tooth position. Only M3, m3, M2, and m2 have large (n > 20) samples from each taxon. Note that there are significant differences at the 95% confidence level for M3, m3, and m2, but not for M2, indicating that the latter is not sufficient for differentiating these taxa. Columns 3 and 4 compare the state-level samples between California and other individual states in which n ≥ 9 and the sample was normally distributed (M3 from Florida and Missouri, and m3 from Colorado, Indiana, and Louisiana/Mississippi). Note that in every case the California sample was significantly different at the 95% confidence level. Columns 5 and 6 compare state-level samples of M. americanum from different states with normally-distributed samples in which n ≥ 9. In every case, the samples did not significantly differ at the 95% confidence level, indicating that M. americanum populations do not differ from each other in M3 and m3 L:W ratios. Bold = significant at 99%.