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

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. If we want to test for the significance of the model, the critical value of F at 95% confidence is

A) 4.17
B) 3.32
C) 2.92
D) 1.96