The randomized block design is a two-way classification design.

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The randomized block design is a two-way classification design since it involves the classification of treatments and blocks. The treatments are the main factor of interest, while the blocks represent any other factor that can influence the response variable. Therefore, it is important to control the effect of the blocks by randomly assigning the treatments to the blocks in order to reduce the noise and improve the precision of the estimates.

The Randomized Block Design Is a Two-Way Classification Design