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

True/False

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 null hypothesis should be rejected when testing whether the quadratic effect of daily average of the percentage of students attending class on percentage of students passing the proficiency test is significant at a 5% level of significance.