The Results of an Experiment Comparing the Cycle Lengths of Three

The results of an experiment comparing the cycle lengths of three different brands of washing machines (N=33) indicated an overall mean square error of 2.58.The researcher believes that the brands 1 and 2 may be the most different as they have mean cycles of 31.8 (n=12) and 35.9 (n=10) .Using an alpha of 0.05, what would be the q obtained for this problem?

A) 3.44
B) 3.80
C) 2.86
D) 3.49
E) 3.82