For the data in Appendix D, form three groups.
In Exercise 16.13.
(These data are available at www.uvm.edu/~dhowell/fundamentals8/DataFiles/Add.dat.) Group 1 has ADDSC scores of 40 or below, Group 2 has ADDSC scores between 41 and 59, and Group 3 has ADDSC scores of 60 or above. Run an analysis of variance on the GPA scores for these three groups.