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

Question 54

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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. 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 (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. Also provided are SSR = 60 and SST = 180. -Refer to Exhibit 13-12. 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 Also provided are SSR = 60 and SST = 180.
-Refer to Exhibit 13-12. 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

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