Here is a partial ANOVA table. Use = 0.05. The values of x, y and z should be:
200, 20, 3.22
12, 1.2, 4.06
200, 20, 4.06
none of the above
The formula is as follows
MS = SS/dF = 1200/6 = 200
For the reference, see the table to derive Fstatistic and Fcritical
http://www.sussex.ac.uk/Users/grahamh/RM1web/F-ratio%20table%202005.pdf
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