Question

In: Statistics and Probability

Below are the average heights for American boys in 1990. Age (years) Height (cm) birth 50.8...

Below are the average heights for American boys in 1990.

Age (years) Height (cm)
birth 50.8
2 83.8
3 91.4
5 106.6
7 119.3
10 137.1
14 157.5

1) Find the estimated average height for a twelve-year-old. (Use your equation from part (d). Round your answer to two decimal places.)
cm

2) Use the least squares line to estimate the average height for a sixty-year-old man. (Use your equation from part (d). Round your answer to one decimal place.)
cm

5) What is the slope of the least squares (best-fit) line? (Round your answer to three decimal places.)


Interpret the slope. (Round your answer to three decimal places.)

As age increases by one year, the average height  ---Select--- increases decreases by  centimeters.

r =

Solutions

Expert Solution

All of the steps have been clearly solved in the pictures. Since part d is not in the question I assumed you already know how the least square equation came. I have just stated it and then used it to find the answers.


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