Refer to Exercise 8 29 a Compare the mean discoloration scores of
Refer to Exercise 8.29.
a. Compare the mean discoloration scores of groups II, III, and IV to the control group. Use an experimentwise error rate of .05.
b. Use the Tukey’s W procedure to compare the mean discoloration scores of groups II, III, and IV. Use an experimentwise error rate of .05.
c. Are there any inconsistencies in your conclusions in parts (a) and ( b)?
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