Table 4. . A linear regression showing that Tsimane’ education is largely predicted by age and gender: More educated Tsimane’ people tend to be young and male. (This accounts for the gender and age effects that are visible in Figure 3.

Residuals:
Min	1Q	Median	3Q	Max
−5.6181	−2.0344	−0.3949	1.2314	11.9871
Coefficients:
	Estimate	SE	t value	Pr( >|t|)
(Intercept)	3.5706	0.2849	12.532	< 2e–16 ***
scale(Age)	−1.2454	0.2818	−4.420	1.99e–05 ***
Gender1	−1.2057	0.2849	−4.232	4.22e–05 ***
scale(Age):Gender1	−0.4277	0.2818	−1.518	0.131

Note: lm(formula = Education ∼ scale(Age) * Gender, data = d). ^†p < .1. *p < .05. **p < .01. ***p < .001.