Advanced Engineering Mathematics
10th Edition
ISBN: 9780470458365
Author: Erwin Kreyszig
Publisher: Wiley, John & Sons, Incorporated
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Transcribed Image Text:Fit a regression line to the data shown in the chart, and find the coefficient of correlation for the line. Use the regression line to predict life expectancy in the year 2020, where x is the number e
decades after 1900.
2 (1920)
life expectancy, y 48.3 years 50.6 years 52.2 years 53.4 years 54.4 years
year, x
0 (1900)
4 (1940) 6 (1960)
8 (1980)
Choose the regression line.
A. y = 0.750x + 48.78
O B. y = 0.750x - 48.78
O C. y = 48.78x + 0.750
O D. y = 48.78
The coefficient of correlation rounded to three decimal places is 0.985.
Is the regression line a good fit?
* Yes
No
The life expectancy in the year 2020, rounded to one decimal place is
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