Exhibit 16-4 In a Laboratory Experiment, Data Were Gathered on the Life

question 74

Multiple Choice

Exhibit 16-4
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. = 36 + 0.8x₁ - 1.7x₂
Also provided are SSR = 60 and SST = 180.
-Refer to Exhibit 16-4. From the above function, it can be said that the life expectancy of rats that were given agent x₂ is

• A)1.7 months more than those who did not take agent x₂
• B)1.7 months less than those who did not take agent x₂
• C)0.8 months less than those who did not take agent x₂
• D)0.8 months more than those who did not take agent x₂

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Definitions:

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Susceptibility

The likelihood or predisposition to be affected by a particular condition, disease, or harm.

Genetic Risk

The likelihood of developing a disease or condition based on inherited genetic factors.

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A diuretic medication used to treat fluid build-up due to heart failure, liver scarring, or kidney disease.