(a)
To explain why a randomized block design would be better than a completely randomized design in this setting.
(a)
Explanation of Solution
In this question, the researchers wants to compare the corn fields. A randomized block design can group the subjects into blocks which have a common characteristics and thus a randomized block design allows us to take into account the change of one or more extra variables. A completely randomized design is only able to take into account the changes of the predictor variables. That is why a randomized block design would be better than a completely randomized design in this setting.
(b)
To explain should the researcher use the rows or the columns of the fields as blocks.
(b)
Answer to Problem 79E
The researcher should use the rows.
Explanation of Solution
In this question, the researchers wants to compare the corn fields. And in this setting a randomized block design would be better than a completely randomized design. So, the researcher should use the rows of the fields as blocks so that, within each block, the location north or south does not vary.
(c)
To use a technology or Table D to carry out the random assignment required by your design.
(c)
Explanation of Solution
In this question, the researchers wants to compare the corn fields. And in this setting a randomized block design would be better than a completely randomized design. Thus, the random assignment will be as follows:
Firstly, label corn varieties A through E as
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The Practice of Statistics for AP - 4th Edition
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