Question: Last week you performed a single linear regression on Birthweight by Gestation { Birthweight~Gestation }. This week you will explore other factors and their impact

Last week you performed a single linear regression on Birthweight by Gestation { Birthweight~Gestation }. This week you will explore other factors and their impact on Birthweight. Start with a single linear regression for the effect of Head Circumference on Birthweight { Birthweight ~ Headcirc }, then perform a multiple regression with all possible factors {Birthweight ~ Gestation + Headcirc + smoker + mage + mnocig + mheight + fage + fedyrs + fnocig + fheight + mage35}, then perform a stepwise regression model selection to find the best model

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