Life Expectancy an Actuary Wanted to Develop a Model to Predict

question 66

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 b₃.

---

Definitions:

Equivalent Units

A principle applied in process costing that transforms units of incomplete production into an equivalent number of units as if they were fully completed.

Weighted-average

A calculation that takes into account the varying degrees of importance of the numbers in a data set, assigning weights to each number before averaging.

Materials

Raw inputs or supplies that are converted into finished goods through the manufacturing process.

Beginning Work

Refers to the initial inventory of goods that are in the process of production at the start of a financial period.