In general, a blocking variable is used to eliminate the variability in the response due to the levels of the blocking variable.

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Quizplus · Accepted Answer

This statement is true. A blocking variable is used in experiments to control for potential confounding variables and eliminate their effects on the response variable. By blocking on specific levels of the blocking variable, the variability due to those levels can be removed from the analysis, allowing for a more precise estimation of treatment effects.

In General, a Blocking Variable Is Used to Eliminate the Variability