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 3.
Definitions:
Aggregate Interests
Aggregate interests refer to the collective interests or preferences of a group, community, or society, often considered in policy-making and political theory to reflect the general will.
Political Scientists
Scholars who study the origin, development, and operation of political systems and public policy.
Electoral Dealignment
A situation where a significant number of voters no longer support a particular political party or remain loyal to it across elections.
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