Life Expectancy an Actuary Wanted to Develop a Model to Predict

question 67

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 ​ S = 9.47 ​ R−Sq = 22.5% ANALYSIS OF VARIANCE ​ ​
-{Life Expectancy Narrative} Interpret the coefficient b₁.

---

Definitions:

Immune System

The body’s mechanism for dealing with invading microorganisms, such as allergens, bacteria, and viruses.

Heart Disease

Heart disease refers to a range of conditions that affect the heart, including coronary artery disease, heart rhythm problems (arrhythmias), and heart defects among others.

Strategies

Plans of action designed to achieve a particular goal or solve specific problems.

Stay Healthy

The practice of engaging in behaviors that promote physical and mental well-being, such as regular exercise, balanced nutrition, and stress management.