Question 4.including 122 countries by regressing "lifeexpf" onto “docs". The variables included are:The following regression results are drawn from a UN data setlifeexpf: female life expectancy in years [i.e., the average for all females in each country]docs: number of doctors per 10,000 of the population.Regression Analysis: lifeexpf versus docsThe regression equation islifeexpf - 58.2 + 0.783 docsPredictorCoef SE CoefTP58.24700.783240.000Constantdocs0.881166.100.0577213.57 0.000S =R-Sq = 60.7%R-Sq (adj) = 60.4%Analysis of VarianceSourceDFsMSFP184.14RegressionResidual Error19082.79082.71195869.5Total12014952.2Please answer the following questions:a) Interpret the impact of docs on lifeexpf.b) Test whether the model can be used for predicting female life expectancy in a country[use a 95% confidence level] and show your work.c) Does the graph below [a plot of the residuals against fitted values] seem to contradictthe answer to part b)? Please explain why or why not.Residuals Versus the Fitted Values(response is lifeexpf)20-10--10--20-6065707580859095Fitted ValueResidual

The estimated regression equation is given as Lifeexpf= 58.2 + 0.783 docs

a) Interpret the impact of docs on lifeexpf. b) Test whether the model can be used for predicting female life expectancy in a country [use a 95% confidence level] and show your work. c) Does the graph below [a plot of the residuals against fitted values] seem to contradict the answer to part b)? Please explain why or why not.

a) Interpret the impact of docs on lifeexpf. b) Test whether the model can be used for predicting female life expectancy in a country [use a 95% confidence level] and show your work. c) Does the graph below [a plot of the residuals against fitted values] seem to contradict the answer to part b)? Please explain why or why not.

College Algebra

7th Edition

ISBN:9781305115545

Author:James Stewart, Lothar Redlin, Saleem Watson

Publisher:James Stewart, Lothar Redlin, Saleem Watson

Chapter1: Equations And Graphs

Section: Chapter Questions

Problem 10T: Olympic Pole Vault The graph in Figure 7 indicates that in recent years the winning Olympic men’s...

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