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The Practice of Statistics | 5th Edition | ISBN: 9781464108730 | Authors: Daren S. Starnes, Josh Tabor
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Solved: Section II: Free Response Show all your work. Indicate clearly the methods you

Chapter 3, Problem T3.11

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QUESTION:

Sarah’s parents are concerned that she seems short for her age. Their doctor has the following record of Sarah’s height:

(a) Make a scatterplot of these data.

(b) Using your calculator, find the equation of the least-squares regression line of height on age.

(c) Use your regression line to predict Sarah’s height at age 40 years (480 months). Convert your prediction to inches 2.54 cm = 1 inch.

(d) The prediction is impossibly large. Explain why this happened.

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QUESTION:

Sarah’s parents are concerned that she seems short for her age. Their doctor has the following record of Sarah’s height:

(a) Make a scatterplot of these data.

(b) Using your calculator, find the equation of the least-squares regression line of height on age.

(c) Use your regression line to predict Sarah’s height at age 40 years (480 months). Convert your prediction to inches 2.54 cm = 1 inch.

(d) The prediction is impossibly large. Explain why this happened.

ANSWER:

Step 1 of 5

Given:

The data for Sarah’s age and height is provided.

 

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