Correlation and Regression Project Chapter 9

Medical researchers have noted that adolescent females are much more likely to deliver low birth weight babies than are adult females. Because low birth weight babies have higher mortality rates, there have been a number of studies examining the relationship between birth weight and mother's age for babies born to young mothers. One such study is described in the article "The Risk of Teen Mothers Having Low Birth Weight Babies: Implications of Recent Medical Research for School Health Personnel"(J. of School Health (1998)271-274. The accompanying data on X = maternal age (years)

Y=birth weight of baby (grams)

1. Make a scatter plot

2. Find little r and decide if correlation exists or not.

3. If correlation does exist, find the regression equation.

4. What is the best predicted weight of a baby whose mother is 18 years old?

5. What is the best predicted weight of a baby whose mother is 15.5 years old?

6. What are the values for the centroid?

7. Should I use this to calculate the birth rate for a young woman who is 21 years old? Why or why not?

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