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Below are bivariate data giving birthrate and life expectancy information for each of twelve countries. For each of the countries, both the number of births x per one thousand people in the population and the female life expectancy y (in years) are given. These data are displayed in the Figure 1 scatter plot. Birthrate, x (number of births per 1000 pop.) 18.9 36.3 49.6 47.3 50.5 40.9 14.3 25.0 32.0 26.0 48.3 14.6 Send data to calculator Female life expectancy, y (in years) 74.3 66.5 60.8 59.5 59.3 64.2 73.6 74.5 64.0 70.5 54.1 75.0 Send data to Excel Female life expectancy (In years) 85 80+ 75+ 70+ 65- 60- 55- 50 Birthrate (number of births per 1000 pop.) Figure 1 The value of the sample correlation coefficient for these data is approximately -0.938. Answer the following. Carry your intermediate computations to at least four decimal places, and round your answers as specified below. (If necessary, consult a list of formulas.) (a) What is the value of the slope of the least-squares regression line for these data? Round your answer to at least two decimal places. (b) What is the value of the y-intercept of the least-squares regression line for these data? Round your answer to at least two decimal places. 0

Below are bivariate data giving birthrate and life expectancy information for each of twelve countries. For each of the countries, both the number of births x per one thousand people in the population and the female life expectancy y (in years) are given. These data are displayed in the Figure 1 scatter plot. Birthrate, x (number of births per 1000 pop.) 18.9 36.3 49.6 47.3 50.5 40.9 14.3 25.0 32.0 26.0 48.3 14.6 Send data to calculator Female life expectancy, y (in years) 74.3 66.5 60.8 59.5 59.3 64.2 73.6 74.5 64.0 70.5 54.1 75.0 Send data to Excel Female life expectancy (In years) 85 80+ 75+ 70+ 65- 60- 55- 50 Birthrate (number of births per 1000 pop.) Figure 1 The value of the sample correlation coefficient for these data is approximately -0.938. Answer the following. Carry your intermediate computations to at least four decimal places, and round your answers as specified below. (If necessary, consult a list of formulas.) (a) What is the value of the slope of the least-squares regression line for these data? Round your answer to at least two decimal places. (b) What is the value of the y-intercept of the least-squares regression line for these data? Round your answer to at least two decimal places. 0

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Below are bivariate data giving birthrate and life expectancy information for each of twelve countries. For each of the countries, both the number of births x per one thousand people in the population and the female life expectancy y (in years) are given. These data are displayed in the Figure 1 scatter plot. Birthrate, x (number of births per 1000 pop.) 18.9 36.3 49.6 47.3 50.5 40.9 14.3 25.0 32.0 26.0 48.3 14.6 Send data to calculator Female life expectancy, y (in years) 74.3 66.5 60.8 59.5 59.3 64.2 73.6 74.5 64.0 70.5 54.1 75.0 Send data to Excel Female life expectancy (In years) 80- 75+ 70+ 65+ 60- 55+ 50. Birthrate (number of births per 1000 pop.) Figure 1 The value of the sample correlation coefficient for these data is approximately -0.938. Answer the following. Carry your intermediate computations to at least four decimal places, and round your answers as specified below. (If necessary, consult a list of formulas.) (a) What is the value of the slope of the least-squares regression line for these data? Round your answer to at least two decimal places. (b) What is the value of the y-intercept of the least-squares regression line for these data? Round your answer to at least two decimal places. 0
Transcribed Image Text:Below are bivariate data giving birthrate and life expectancy information for each of twelve countries. For each of the countries, both the number of births x per one thousand people in the population and the female life expectancy y (in years) are given. These data are displayed in the Figure 1 scatter plot. Birthrate, x (number of births per 1000 pop.) 18.9 36.3 49.6 47.3 50.5 40.9 14.3 25.0 32.0 26.0 48.3 14.6 Send data to calculator Female life expectancy, y (in years) 74.3 66.5 60.8 59.5 59.3 64.2 73.6 74.5 64.0 70.5 54.1 75.0 Send data to Excel Female life expectancy (In years) 80- 75+ 70+ 65+ 60- 55+ 50. Birthrate (number of births per 1000 pop.) Figure 1 The value of the sample correlation coefficient for these data is approximately -0.938. Answer the following. Carry your intermediate computations to at least four decimal places, and round your answers as specified below. (If necessary, consult a list of formulas.) (a) What is the value of the slope of the least-squares regression line for these data? Round your answer to at least two decimal places. (b) What is the value of the y-intercept of the least-squares regression line for these data? Round your answer to at least two decimal places. 0
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