Answered: Studies suggest that women who smoke…

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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Question

Studies suggest that women who smoke during pregnancy affect the birth weights of their newborn infants. To study this issue further, a sample of 10 women smokers were asked to estimate the average number of cigarettes they smoke per day. In the following table are their estimates and the birth weight (in kgs) of their child.

Average Number of Cigarettes per day	Birth Weight of Child (in kilograms)
22	2.91
16	3.27
4	3.68
19	3.14
42	2.32
8	3.82
12	3.45
30	2.95
14	3.00
16	3.68

(b) Use R-Studio to find the least squares estimate of the linear model that expresses the birth weight of a child as a linear function of the average number of cigarettes mom consumes in a day. Use four decimals in each of your answers.

Y^i = ? + - Xi

(e) A expecting mother, who smokes, claims to smoke an average of 20 cigarettes in a day. Predict the weight of her newborn. Use two decimals in your answer.

kilograms

(f) The weight of the child born to the expecting mother mentioned in (e) was 4.2 kilograms. Find the residual, use two decimals.

ei=

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