To calculate the homoskedasticity-only overall regression F-statistic,you need to compare the SSRrestricted with the SSRunrestricted.Consider the following output from a regression package,which reproduces the regression results of testscores on the student-teacher ratio,the percent of English learners,and the expenditures per student from your textbook:
Dependent Variable: TESTSCR
Method: Least Squares
Date: 07/30/06 Time: 17:55
Sample: 1 420
Included observations: 420 
Sum of squared resid corresponds to SSRunrestricted.How are you going to find SSRrestricted?
Definitions:
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