We are going to run the following problem using STORM Software.
A random sample of 7 one baby live births revealed the following birth weights (lbs) and cigarette smoking habits of mothers (cigarettes smoked per day:
Cigarettes/day 0 10 0 30 0 25 40
Baby Birth Weight 8.5 6.5 7.2 5.8 8.0 8.3 6.0
Run a simple linear regression on the above data.
(a) What is the estimated regression line?
(b) What sort of relationship exists between the birth weight of the smoking habit of the mother
(c) Interpret the intercept and the slope of the regression line.
(d) Interpret the R-Square value.
(e) In your opinion, what other variables not in this regression have a bearing on the birth weight of babies?
(f) Predict the average birth weight of a baby (i) of a non-smoking mother, (ii) a mother with a one-pack-a-day habit, (iii) a mother with a two-pack a day habit, (iv) a mother with a three pack-a-day habit, (v) a mother with a five-pack-a-day habit. Which of the above predictions are you least sure of and why?