Conduct the ANOVA test for each of the following sets of scores. (HINT: Follow the computational shortcut outlined in Section 10.4, and keep track of all sums and means by constructing computational tables like Table 10.3 or 10.4.)

a. Category AB C 5 10 12 7 12 16 8 14 18 9 15 20

b. Category A BC 123 10 12 10 927 20 3 14 811

c. Category A BCD 13 45 23 10 15 40 78 20 10 47 80 25 11 50 34 27 10 45 30 20