Life Expectancy an Actuary Wanted to Develop a Model to Predict

question 43

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 ( x ₁), the cholesterol level ( x ₂), and the number of points that the individual's blood pressure exceeded the recommended value ( x ₃). 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 + 1.79 x ₁ - 0.021 x ₂ - 0.061 x ₃

S = 9.47 R - Sq = 22.5%
{Life Expectancy Narrative} Interpret the coefficient b ₁.

---

Definitions:

Promissory Note

A written promise to pay a specified amount of money to a designated person or entity by a certain date or on demand.

Maker

The individual or entity that creates or signs a negotiable instrument, committing to pay the specified sum to the holder.

Negotiable

Capable of being transferred or converted into cash or equivalent value, often used in reference to financial instruments.

Payable on Demand

Refers to a financial obligation that must be paid by the debtor when the creditor requests it.