Refer to Exercise 15.14.
a. Describe how the treatments would be randomly assigned to the roadways.
b. Compute the relative efficiency of the randomized block design compared to a completely randomized design. Was the blocking of the roadways based on traffic volume effective in reducing the variability in the counts of number of cracks? Explain.
c. If this study was repeated during the next winter, would you recommend that traffic volume be used to block the roadways, or would it be more efficient to design the study as a completely randomized design?
In exercise

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