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c. Find the equation of the least squares line. d. Use your answer from part c to predict the poverty level in the year 2018.

c. Find the equation of the least squares line. d. Use your answer from part c to predict the poverty level in the year 2018.

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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How do you do questions C and D?

20. Poverty Levels The following table lists how poverty level income cutoffs (in dollars) for a family of four have changed over time. Source: U.S. Census Bureau. Year 1980 1985 1990 1995 2000 2005 2008 Income 8414 10,989 13,359 15,569 17,604 19.961 22,207 Let x represent the year, with x = 0 corresponding to 980 and y represent the income in thousands of dollars. a. Plot the data. Do the data appear to lie along a straight line? b. Calculate the correlation coefficient. Does your result agree with your answer to part a? c. Find the equation of the least squares line. d. Use your answer from part c to predict the poverty level in the year 2018. ST AL CENTRE en in den MARQUE LAMPE R 2 por ( | WE KE
Transcribed Image Text:20. Poverty Levels The following table lists how poverty level income cutoffs (in dollars) for a family of four have changed over time. Source: U.S. Census Bureau. Year 1980 1985 1990 1995 2000 2005 2008 Income 8414 10,989 13,359 15,569 17,604 19.961 22,207 Let x represent the year, with x = 0 corresponding to 980 and y represent the income in thousands of dollars. a. Plot the data. Do the data appear to lie along a straight line? b. Calculate the correlation coefficient. Does your result agree with your answer to part a? c. Find the equation of the least squares line. d. Use your answer from part c to predict the poverty level in the year 2018. ST AL CENTRE en in den MARQUE LAMPE R 2 por ( | WE KE
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