4 The data set BWGHT contains data on births to women in the United States. Two variables of interestare the dependent variable, infant birth weight in ounces (bwght), and an explanatory variable, averagenumber of cigarettes the mother smoked per day during pregnancy (cigs). The following simple regres-sion was estimated using data on n = 1,388 births:bwght = 119.77 – 0.514 cigs|(i) What is the predicted birth weight when cigs = 0? What about when cigs = 20 (one pack perday)? Comment on the difference.(ii) Does this simple regression necessarily capture a causal relationship between the child's birthweight and the mother's smoking habits? Explain. (iii) To predict a birth weight of 125 ounces, what would cigs have to be? Comment.(iv) The proportion of women in the sample who do not smoke while pregnant is about .85. Doesthis help reconcile your finding from part (iii)?

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Answered: 4 The data set BWGHT contains data on…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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