MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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The number of adult Americans who smoke continues to drop. The table contains estimates of the percentages of adults (ages 1818 and over) who were smokers in the years between 1965 and 201715.and 201715.

???? ?Year � ??????? ?Smokers �
1965 41.94
1970 37.4
1974 37.1
1978 34.1
1980 33.2
1983 32.1
1985 30.1
1987 28.8
1990 25.5
1993 25.0
1995 24.7
1997 24.7
1999 23.5
2001 22.8
2002 22.5
2004 20.9
2006 20.8
2008 20.6
2010 19.3
2012 18.1
2014 16.8
2017 14.0

 

According to your regression line, how much did smoking decline per year during this period, on the average? Give your answer to three decimal places.

average smoking decline:
 
percentage points
Expert Solution
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Step 1

Given

The data is as follows:

Year Smokers
1965 41.94
1970 37.4
1974 37.1
1978 34.1
1980 33.2
1983 32.1
1985 30.1
1987 28.8
1990 25.5
1993 25
1995 24.7
1997 24.7
1999 23.5
2001 22.8
2002 22.5
2004 20.9
2006 20.8
2008 20.6
2010 19.3
2012 18.1
2014 16.8
2017 14
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