A roofing company would like to implement a new method for giving estimates. The

Question

A roofing company would like to implement a new method for giving estimates. The owner has narrowed his choice to three different methods. Since estimator variability is believed to be a significant factor in the overall cost estimate, each of the company's three job estimators is asked to give a cost estimate for a new roof using each of the three methods. The data will be analyzed using a randomized block design. What are the blocks in this study?

a. the roofing company b. the estimators c. the estimate method d. the cost for a new roof

Explanation / Answer

With a randomized block design, the experimenter divides subjects into subgroups called blocks, such that the variability within blocks is less than the variability between blocks. Then, subjects within each block are randomly assigned to treatment conditions.

from this methods are the blocks and subjects within blocks are the estimators

within estimators have less variability and the variability between three methods is more.

option c is correct

estimate method is the block.

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