Solved

Life Expectancy an Actuary Wanted to Develop a Model to Predict

Question 145

Essay

Life Expectancy
An actuary wanted to develop a model to predict how long individuals will live.After consulting a number of physicians,she collected the age at death (y),the average number of hours of exercise per week (x1),the cholesterol level (x2),and the number of points that the individual's blood pressure exceeded the recommended value (x3).A random sample of 40 individuals was selected.The computer output of the multiple regression model is shown below. THE REGRESSION EQUATION IS y = 55.8 + 1.79x1− 0.021x2− 0.061x3 Life Expectancy An actuary wanted to develop a model to predict how long individuals will live.After consulting a number of physicians,she collected the age at death (y),the average number of hours of exercise per week (x<sub>1</sub>),the cholesterol level (x<sub>2</sub>),and the number of points that the individual's blood pressure exceeded the recommended value (x<sub>3</sub>).A random sample of 40 individuals was selected.The computer output of the multiple regression model is shown below. THE REGRESSION EQUATION IS y = 55.8 + 1.79x<sub>1</sub>− 0.021x<sub>2</sub>− 0.061x<sub>3</sub> ​ S = 9.47 ​ R−Sq = 22.5% ANALYSIS OF VARIANCE ​ ​ -{Life Expectancy Narrative} What is the coefficient of determination? What does this statistic tell you? ​ S = 9.47 ​ R−Sq = 22.5% ANALYSIS OF VARIANCE Life Expectancy An actuary wanted to develop a model to predict how long individuals will live.After consulting a number of physicians,she collected the age at death (y),the average number of hours of exercise per week (x<sub>1</sub>),the cholesterol level (x<sub>2</sub>),and the number of points that the individual's blood pressure exceeded the recommended value (x<sub>3</sub>).A random sample of 40 individuals was selected.The computer output of the multiple regression model is shown below. THE REGRESSION EQUATION IS y = 55.8 + 1.79x<sub>1</sub>− 0.021x<sub>2</sub>− 0.061x<sub>3</sub> ​ S = 9.47 ​ R−Sq = 22.5% ANALYSIS OF VARIANCE ​ ​ -{Life Expectancy Narrative} What is the coefficient of determination? What does this statistic tell you? ​ ​
-{Life Expectancy Narrative} What is the coefficient of determination? What does this statistic tell you?

Correct Answer:

verifed

Verified

R2 = 0.225.This means that 22.5% of the v...

View Answer

Unlock this answer now
Get Access to more Verified Answers free of charge

Related Questions

Q140: Some of the requirements for the error

Q141: The total variation in y in a

Q142: In multiple regression,the standard error of estimate

Q143: Student's Final Grade <br>A statistics professor investigated

Q144: Student's Final Grade <br>A statistics professor investigated

Q146: In order to test the validity of

Q147: Which of the following statements regarding multicollinearity

Q148: In a multiple regression model,the following statistics

Q149: Real Estate Builder<br> A real estate

Q150: To test the validity of a multiple