New car sales have increased at a roughly linear rate. Sales, in millions of vehicles, from 2000
Question:
New car sales have increased at a roughly linear rate. Sales, in millions of vehicles, from 2000 to 2007, are given in the table below. Source: National Automobile Dealers Association. Let x represent the number of years since 2000.
a. Find the equation of the least squares line and the correlation coefficient.
b. Find the equation of the least squares line using only the data for every other year starting with 2000, 2002, and so on. Find the correlation coefficient.
c. Compare your results for parts a and b. What do you find? Why do you think this happens?
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a To find the equation of the least squares line and the correlation coefficient we can use linear r...View the full answer
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Related Book For 
Calculus With Applications
ISBN: 9780321831101
10th Edition
Authors: Margaret L Lial, Raymond N Greenwell, Nathan P Ritchey
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