What does the regression coefficient for smoking mean in Table 11.34? How does it differ from the
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It is well known that age, height, and sex are important predictors of pulmonary function. Hence, we ran the regression model in Table 11.34.
Table 11.34: Regression of FEV on age, height, gender and smoking in FEV.DAT
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Regression Analysis: FEV vs. Age, Hgt, Sex, Smoke The regression equation is FEV = - 4.46 + 0.0655 Age + 0.104 Hgt + 0.157 Gender - 0.0872 Smoke Predictor Coef SE Coef -20.00 Constant -4.4570 0.2228 0.000 0.000 0.065509 0.009489 6.90 Age 0.104199 0.004758 21.90 0.000 Hgt 0.15710 0.03321 4.73 0.000 Sex Smoke 0.05925 -0.08725 -1.47 0.141 s = 0.412216 R-sq = 77.5% R-sq(adj) = 77.4% Analysis of Variance Source DF MS Regression 380.640 95.160 560.02 0.000 Residual 649 110.280 0.170 Error Total 653 490.920
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