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 6.29.

Table 6.29 Data for Exercise 2 Color Time Red 9 11 10 9 15 Green 20 21 23 17 30 Black 6 5 8 14 7

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

(b) Assuming that there is no additional information on the purpose of the experiment, should specific hypotheses be tested by a multiple-range test (Duncan’s) or orthogonal contrasts? Perform the indicated analysis.

(c) Suppose now that someone told you that the purpose of the experimentwas to see whether the color green had some special effect. Does this revelation affect your answer in part (b)? If so, redo the analysis. LO.1