EXAMPLE: is there a difference in test scores in the following 4 groups? Gp 1=control, Gp 2=one week focus, Gp 3=semester focus, Gp 4=five year focus. Mean SD N Gp 1 4.00 0.89 6 Gp 2 4.67 0.82 6 Gp 3 5.33 1.03 6 Gp 4 8.00 0.89 6 Total 5.50 1.77 24