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

question 28

Multiple Choice

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.
$\hat { Y }$ =36+0.8X1 - 1.7X2
Also provided are SSR = 60 and SST = 180.
-Refer to Exhibit 13-12. The p-value for testing the significance of the regression model is

• A) less than 0.01
• B) between 0.01 and 0.025
• C) between 0.025 and 0.05
• D) between 0.05 and 0.10

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