What Is the Purpose of Adding a Blocking Variable to a Randomized

question 7

Multiple Choice

What is the purpose of adding a blocking variable to a randomized block design ANOVA experiment?

• A) To factor out the effects of the block on the means of the groups
• B) To increase the overall sample size and reduce the standard errors
• C) To investigate the effects of the block on the means of the groups
• D) To reduce the variation and observed differences between groups

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