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Pes dels nadons i paquets de cigarretes fumats per la mare. cor(packs, lbwght) r = -0.1406743. Y = 4.7 7 - 0.0 9 X ( 0.01 7) -5.29. plot(lm(lbwght ~packs)). lm(lbwght~packs) Coefficients: (Intercept) packs 4.76940 -0.08981 lm(packs~fatheduc)
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cor(packs, lbwght) r = -0.1406743
Y = 4.77 -0.09 X (0.017) -5.29
lm(lbwght~packs) Coefficients: (Intercept) packs 4.76940 -0.08981 lm(packs~fatheduc) Coefficients: (Intercept) fatheduc 0.31827 -0.01743 lm(packs~motheduc) Coefficients: (Intercept) motheduc 0.45216 -0.02688 lm(lbwght~motheduc) Coefficients: (Intercept) motheduc 4.693388 0.005157 lm(lbwght~fatheduc) Coefficients: (Intercept) fatheduc 4.700098 0.005108