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The Practice of Statistics | 5th Edition | ISBN: 9781464108730 | Authors: Daren S. Starnes, Josh Tabor
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Answer: Section II: Free Response Show all your work. Indicate clearly the methods you

Chapter 4, Problem T4.12

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QUESTION:

Section II: Free Response  Show all your work. Indicate clearly the methods you use, because you will be graded on the correctness of your methods as well as on the accuracy and completeness of your results and explanations.

Elephants sometimes damage trees in Africa. It turns out that elephants dislike bees. They recognize beehives in areas where they are common and avoid them. Can this be used to keep elephants away from trees? Will elephant damage be less in trees with hives? Will even empty hives keep elephants away? Researchers want to design an experiment to answer these questions using 72 acacia trees.

(a) Identify the experimental units, treatments, and the response variable.

(b) Describe how the researchers could carry out a completely randomized design for this experiment. Include a description of how the treatments should be assigned.

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QUESTION:

Section II: Free Response  Show all your work. Indicate clearly the methods you use, because you will be graded on the correctness of your methods as well as on the accuracy and completeness of your results and explanations.

Elephants sometimes damage trees in Africa. It turns out that elephants dislike bees. They recognize beehives in areas where they are common and avoid them. Can this be used to keep elephants away from trees? Will elephant damage be less in trees with hives? Will even empty hives keep elephants away? Researchers want to design an experiment to answer these questions using 72 acacia trees.

(a) Identify the experimental units, treatments, and the response variable.

(b) Describe how the researchers could carry out a completely randomized design for this experiment. Include a description of how the treatments should be assigned.

ANSWER:

Step 1 of 2

A)

EXPERIMENTAL UNITS =72 selected acacia trees

TREATMENT = Place active/empty/no beehive in the tree

RESPONSE VARIABLE = Damage caused by elephants

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