Might we be able to predict life expectancies from birthrates? Below are bivariate data giving birthrate and life expectancy information for each of twelve countries. For each of the countries, both x, the number of births per one thousand people in the population, and y, the female life expectancy (in years), are given. Also shown are the scatter plot for the data and the least-squares regression line. The equation for this line is y = 82.85 -0.48x. Birthrate, x (number of births per 1000 people) Female life expectancy, y (in years) 48.0 63.1 16.8 74.0 80 51.3 54.2 24.8 75.4 44.5 58.9 30.9 64.1 41.7 64.2 55 35.6 66.7 14.1 73.9 25.7 73.0 50 15.4 74.8 Birthrate 50.8 59.4 (number of births per 1000 people) Send data to calculator Send data to Excel Based on the sample data and the regression line, answer the following. Female life expectancy (in years)
Might we be able to predict life expectancies from birthrates? Below are bivariate data giving birthrate and life expectancy information for each of twelve countries. For each of the countries, both x, the number of births per one thousand people in the population, and y, the female life expectancy (in years), are given. Also shown are the scatter plot for the data and the least-squares regression line. The equation for this line is y = 82.85 -0.48x. Birthrate, x (number of births per 1000 people) Female life expectancy, y (in years) 48.0 63.1 16.8 74.0 80 51.3 54.2 24.8 75.4 44.5 58.9 30.9 64.1 41.7 64.2 55 35.6 66.7 14.1 73.9 25.7 73.0 50 15.4 74.8 Birthrate 50.8 59.4 (number of births per 1000 people) Send data to calculator Send data to Excel Based on the sample data and the regression line, answer the following. Female life expectancy (in years)
MATLAB: An Introduction with Applications
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Author:Amos Gilat
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Transcribed Image Text:Might we be able to predict life expectancies from birthrates?
Below are bivariate data giving birthrate and life expectancy information for each of twelve countries. For each of the countries, both x, the number of births per
one thousand people in the population, and y, the female life expectancy (in years), are given. Also shown are the scatter plot for the data and the least-squares
regression line. The equation for this line is y = 82.85 –0.48x.
Birthrate, x
(number of births per 1000 people)
Female life expectancy, y
(in years)
48.0
63.1
85-
16.8
74.0
80-
51.3
54.2
75+
24.8
75.4
70
44.5
58.9
65
30.9
64.1
60-
41.7
64.2
55+
35.6
66.7
50
14.1
73.9
25.7
73.0
40
só s5
60
15.4
74.8
Birthrate
50.8
59.4
(number of births per 1000 people)
Send data to calculator
Send data to Excel
Based on the sample data and the regression line, answer the following.
(a) From the regression equation, what is the predicted female life expectancy (in years) when the birthrate is 35.6 births
Female life expectancy
(in years)
回8哈
Transcribed Image Text:51.3
Español
54.2
24.8
75.4
44.5
58.9
30.9
64.1
41.7
64.2
35.6
66.7
00
14.1
73.9
25.7
73.0
15.4
74.8
Birthrate
50.8
59.4
(number of births per 1000 people)
Send data to calculator
Send data to Excel
Based on the sample data and the regression line, answer the following.
(a) From the regression equation, what is the predicted female life expectancy (in years) when the birthrate is 35.6 births
per 1000 people? Round your answer to one or more decimal places.
(b) What was the observed female life expectancy (in years) when the birthrate was 35.6 births per 1000 people?
Female lire expectancy
(in years)
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