Randomized Block Design

Describe randomized block design experiments.

Which of these statements best describes a randomized block design experiment?

• a.)In this experiment, closely matched elements are paired, and then one of them is put in the treatment group and the other in the control group.
• b.)In this experiment, the subjects are divided into homogeneous blocks and a treatment is assigned to every element of the block.
• c.)In this experiment, the subjects are divided into groups by a variable of interest and the elements are then randomly allocated to treatment and control groups within these groups.
• d.)In this experiment, a sample is divided roughly into some groups and then some of the groups are randomly selected.

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