Let x be the size of a house (in square feet) and y be the amount of
Question:
a. What is the equation of the population regression line?
b. Graph the population regression line by first finding the point on the line corresponding to x = 1000 and then the point corresponding to x = 2000, and drawing a line through these points.
c. What is the mean value of gas usage for houses with 2100 sq. ft. of space?
d. What is the average change in usage associated with a 1 sq. ft. increase in size?
e. What is the average change in usage associated with a 100 sq. ft. increase in size?
f. Would you use the model to predict mean usage for a 500 sq. ft. house? Why or why not?
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Related Book For
Statistics The Exploration & Analysis Of Data
ISBN: 9780840058010
7th Edition
Authors: Roxy Peck, Jay L. Devore
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