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. The life expectancy of a rat that was given 3 units of protein daily, and who took agent x₂ is

Question

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.

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 (x<sub>1</sub>) , and whether or not agent x<sub>2</sub> (a proposed life extending agent) was added to the rats diet (x<sub>2</sub> = 0 if agent x<sub>2</sub> was not added, and x<sub>2</sub> = 1 if agent was added.) From the results of the experiment, the following regression model was developed. = 36 + 0.8x<sub>1</sub> - 1.7x<sub>2</sub> 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 x<sub>2</sub> is A) 36.7 B) 36 C) 49 D) 38.4

= 36 + 0.8x₁ - 1.7x₂
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

Quizplus · Accepted Answer

Plug in the given values into the regression equation: y = 36 + 0.8(3) - 1.7(1) = 38.4 Therefore, the life expectancy of a rat that was given 3 units of protein daily, and who took agent x₂ is 38.4 months. The answer is D.

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