Three sets of five mice were randomly selected to be placed in a standard maze but with different color doors. The response is the time required to complete the maze as seen in Table 6.25.

(a) Perform the appropriate analysis to test whether there is an effect due to door color.

(b) The researchers have no prior expectation as to how the groups will differ but plan to explore all pairwise comparisons. Carry out the best analysis.

(c) Suppose now that someone told you that the purpose of the experiment was to see whether the color green had some special effect. Does this revelation affect your answer in part (b)? If so, redo the analysis.

Table 6.25 Data for Exercise 8. Color Time Red 9 11 Green 20 21 23 Black 6 5 238 10 6 15 17 30 14 7