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

question 71

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 given 3 units of protein daily, and who took agent X₂ is

• A)36.7
• B)36
• C)49
• D)38.4

---

Definitions:

External Environment

All outside factors and influences that impact the operation and success of an entity, including economic, social, political, and technological factors.

Ancient Scholars

Individuals from historical periods who contributed significantly to knowledge in various fields such as philosophy, science, and literature.

Human Nature

The general psychological characteristics, feelings, and behavioral traits of humankind, regarded as shared by all humans.

Empirical Evidence

Information acquired by observation or experimentation that is used as a basis for knowledge or validation of scientific theories.