TABLE 15-4 The Output from the Best-Subset Regressions Is Given Below

Multiple Choice

TABLE 15-4

The output from the best-subset regressions is given below:

Following is the residual plot for % Attendance:

Following is the output of several multiple regression models:
Model (I) :

Model (II) :

Model (III) :

-Referring to Table 15-4, the "best" model using a 5% level of significance among those chosen by the Cp statistic is

A) X₁,X₃.
B) X₁,X₂,X₃.
C) Either of the above
D) None of the above