Context VI. The August 2000 issue of Nature reported the results of an investigation by robotics researchers M.J.B. Krieger, J.-B. Billeter and L. Keller who tried to determine whether robots could be trained to behave like ants in an ant colony. Robots were trained and randomly assigned to \"colonies" (i.e., groups) consisting of 3, 6. 9, or 12 robots. The robots were assigned the tasks of foraging for \"food'I and recruiting another robot when they identified a resource-rich area. One goal of the experiment was to compare the mean energy expended (per robot) of the four different sizes of colonies. Answer Questions 2325 by reference to Context VI. 23. How many pairwise comparisons between group means could be made in total? A) 3 B) 4 C) 6 D) a E) 12 24. Could treatment means be ranked via Tukey's multiple comparison procedure? A) Yes B) No 25. What would be the comparisonwise error rate recommended by Bonferroni's correction for multiple comparisons in order to achieve an experimentwise error rate of 0:96? A) 05/3 B) a/4 C) mm D) cr/B E) a/12