mariamejiamm007 mariamejiamm007

11-09-2022
Mathematics

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A citrus farmer wants to know which of three fertilizers (A, B, and C) is most effective for increasing the number of oranges on his trees. He is willing to use 30 mature trees of various sizes from his orchard in an experiment with a randomized block design.

Which of the following is a correct step regarding the randomized block design of this experiment?

Step 1: It is reasonable to think that there is an association between the size of the tree and number of oranges produced. So to control this influence, the farmer should form blocks based on the size of the trees (small, medium, large).
Step 2: The farmer should randomly assign one-third of the small trees to fertilizer A, one-third to fertilizer B, and one-third to fertilizer C.
Step 3: The farmer should do the same allocation for the medium and large sized trees.
Step 4: In the end, the farmer should measure each tree’s orange production.
or all of them correct?

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