Let x be the age of a licensed driver in years. Let y be the percentage of all fatal accidents (for a given age) due to failure to yield the right of way. For example, the first data pair states that 5% of all fatal accidents of 37-year-olds are due to failure to yield the right of way. x | 37 47 57 67 77 87 8 10 32 41 Complete parts (a) through (e), given Ex = 372, Ey = 113, Ex² = 24814, Ey² = 3183, Exy = 8301, and r= 0.953. (a) Draw a scatter diagram displaying the data.

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Let x be the age of a licensed driver in years. Let y be the percentage of all fatal accidents (for a given age) due to failure to yield the
right of way. For example, the first data pair states that 5% of all fatal accidents of 37-year-olds are due to failure to yield the right of
way.
× | 37
47
57
67
77
87
y
5
8
10
17
32
41
Complete parts (a) through (e), given Ex = 372, Ey = 113, Ex2 = 24814, Ey2 = 3183, Exy = 8301, andr= 0.953.
(a) Draw a scatter diagram displaying the data.
Transcribed Image Text:Let x be the age of a licensed driver in years. Let y be the percentage of all fatal accidents (for a given age) due to failure to yield the right of way. For example, the first data pair states that 5% of all fatal accidents of 37-year-olds are due to failure to yield the right of way. × | 37 47 57 67 77 87 y 5 8 10 17 32 41 Complete parts (a) through (e), given Ex = 372, Ey = 113, Ex2 = 24814, Ey2 = 3183, Exy = 8301, andr= 0.953. (a) Draw a scatter diagram displaying the data.
= 27.112
X +0.741
(d) Graph the least-squares line. Be sure to plot the point (X, y) as a point on the line.
y
y
10아
100}
80
80
60
60
40
40
20
20
20
40
60
80
20
40
60
80
-20아
- 20
y
y
100
10아
80
80
60
60
40
40
20
20
20
40
60
80
20
40
60
80
- 20
- 20
(e) Find the value of the coefficient of determination r2. What percentage of the variation in y can be explained by the
corresponding variation in x and the least-squares line? What percentage is unexplained? (Round your answer for r? to three
decimal places. Round your answers for the percentages to one decimal place.)
explained
%
unexplained
%
(f) Predict the percentage of all fatal accidents due to failing to yield the right of way for 75-year-olds. (Round your answer to
two decimal places.)
%
Transcribed Image Text:= 27.112 X +0.741 (d) Graph the least-squares line. Be sure to plot the point (X, y) as a point on the line. y y 10아 100} 80 80 60 60 40 40 20 20 20 40 60 80 20 40 60 80 -20아 - 20 y y 100 10아 80 80 60 60 40 40 20 20 20 40 60 80 20 40 60 80 - 20 - 20 (e) Find the value of the coefficient of determination r2. What percentage of the variation in y can be explained by the corresponding variation in x and the least-squares line? What percentage is unexplained? (Round your answer for r? to three decimal places. Round your answers for the percentages to one decimal place.) explained % unexplained % (f) Predict the percentage of all fatal accidents due to failing to yield the right of way for 75-year-olds. (Round your answer to two decimal places.) %
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