What is the value of r2?Use the square root and your knowledge about the slope of the regression line to find the value of the correlation constant r.Based only on the value of r, do you think this line is useful for predicting life expectancy from the infant mortality rate? A new country called Arendelle has formed and has an infant mortality rate of 42 (deaths per 1000 live births). Use the equation of the regression line to predict the life expectancy for Arendelle. Round your answer to one decimal place.Another new country called Weselton has formed and has an infant mortality rate of 250 (deaths per 1000 live births). Recall some of the cautions we should take when considering correlation. In one or two complete sentences, explain why using the linear regression equation to make a life expectancy prediction is not a good idea for Weselton.If you had to choose exactly one potential influential outlier from the original data set, what would it be? Identify the point as an ordered pair (x,y).What is the new value of the correlation constant r?Based on the value of r and/or the fit of the regression line, is the new regression line a better predictor for a country’s life expectancy? Explain, using 2 or more complete sentences Life Expectancy807050400Fitted Line PlotLife Expectancy = 77.82 - 0.2769 Infant Mortality Rate20406080 100Infant Mortality Rate120140160SR-SqR-Sq(adj)7.0427462.1%61.5%

Answered: What is the value of r2? Use the square…

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

Related questions

Question

100%

What is the value of r²?
Use the square root and your knowledge about the slope of the regression line to find the value of the correlation constant r.
Based only on the value of r, do you think this line is useful for predicting life expectancy from the infant mortality rate?
A new country called Arendelle has formed and has an infant mortality rate of 42 (deaths per 1000 live births). Use the equation of the regression line to predict the life expectancy for Arendelle. Round your answer to one decimal place.
Another new country called Weselton has formed and has an infant mortality rate of 250 (deaths per 1000 live births). Recall some of the cautions we should take when considering correlation. In one or two complete sentences, explain why using the linear regression equation to make a life expectancy prediction is not a good idea for Weselton.
If you had to choose exactly one potential influential outlier from the original data set, what would it be? Identify the point as an ordered pair (x,y).
What is the new value of the correlation constant r?
Based on the value of r and/or the fit of the regression line, is the new regression line a better predictor for a country’s life expectancy? Explain, using 2 or more complete sentences