Exhibit 13-12
in a Laboratory Experiment, Data Were Gathered on the Life

question 22

Multiple Choice

Exhibit 13-12
In a laboratory experiment, data were gathered on the life span Y in months) of 33 rats, units of daily protein intake X1) , and whether or not agent X2 a proposed life extending agent) was added to the rats diet X2 = 0 if agent X2 was not added, and X2 = 1 if agent was added.) From the results of the experiment, the following regression model was developed.
$\hat { Y }$ =36+0.8X1 - 1.7X2
Also provided are SSR = 60 and SST = 180.
-Refer to Exhibit 13-12. The multiple coefficient of determination is

• A) 0.2
• B) 0.5
• C) 0.333
• D) 5

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Definitions:

Medicare

A federal program that provides for (1) compulsory hospital insurance for senior citizens, (2) low-cost voluntary insurance to help older Americans pay physicians’ fees, and (3) subsidized insurance to buy prescription drugs. Financed by payroll taxes.

Social Security

The social insurance program in the United States financed by federal payroll taxes on employers and employees and designed to replace a portion of the earnings lost when workers become disabled, retire, or die.

Medicaid

A federal program that helps finance the medical expenses of individuals covered by the Supplemental Security Income (SSI) and Temporary Assistance for Needy Families (TANF) programs.

Low-income Workers

Individuals employed in jobs that pay wages below a certain threshold, often struggling to meet basic living expenses.