Refer to Exercise 2 in Section 9.1.a. Use the Bonferroni method to determine which means, if any, differ from the mean of the control group at the 5% level.

b. Use the Tukey??Kramer method to determine which means, if any, differ from the mean of the control group at the 5% level.

c. Which is the more powerful method to find the treatments whose mean differs from that of the control group, the Bonferroni method or the Tukey??Kramer method?

Refer to Exercise 2 in Section 9.1.

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Fertilizer Height 16.9 12.4 Control 17.9 12.2 6.9 14.9 13.8 26.1 15.4 20.3 12.7 20.8 14.8 Deficient 7.0 13.3 11.1 11.0 16.5 17.1 9.0 Slow-release 19.8 20.3 16.1 17.9 12.4 12.5 17.4 19.9 27.3 14.4