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

question 13

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. Also provided are SSR = 60 and SST = 180.
-Refer to Exhibit 16-4. The life expectancy of a rat that was not given any protein and that did not take agent X₂ is

• A)36.7
• B)34.3
• C)36
• D)38.4

---

Definitions:

Rational

Pertaining to reasoning or logical thinking; often involves making decisions based on reason rather than emotions.

Emotional

Pertains to feelings, moods, or affective states that are experienced by individuals, influencing behavior, thought processes, and well-being.

Unconscious

The part of the mind that contains thoughts, memories, and desires not currently in conscious awareness but that can influence behavior.

Pervasive

Spreading widely throughout an area or a group of people, often referring to elements that are present in all parts of a particular society or system.