TABLE 11-10
an Agronomist Wants to Compare the Crop

question 125

Short Answer

TABLE 11-10
An agronomist wants to compare the crop yield of 3 varieties of chickpea seeds. She plants all 3 varieties of the seeds on each of 5 different patches of fields. She then measures the crop yield in bushels per acre. Treating this as a randomized block design, the results are presented in the table that follows.
$\begin{array}{lcll}\text { Fields } & \text { Smith } & \text { Walsh } & \text { Trevor } \\1 & 11.1 & 19.0 & 14.6 \\2 & 13.5 & 18.0 & 15.7 \\3 & 15.3 & 19.8 & 16.8 \\4 & 14.6 & 19.6 & 16.7 \\5 & 9.8 & 16.6 & 15.2\end{array}$

-Referring to Table 11-10, using an overall level of significance of 0.01, what is the critical range for the Tukey multiple comparison procedure?

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Definitions:

Ethical Issue

A situation that requires a person or organization to choose between alternatives that must be evaluated as right (ethical) or wrong (unethical).

Human Subjects

Individuals who participate in research studies, whose rights and welfare are protected by ethical guidelines.

Psychological Damage

Emotional or mental injury caused by experiences of stress, trauma, or abuse that adversely affects an individual’s mental health and well-being.

Construct Validity

The degree to which a test measures what it claims, or purports, to be measuring. It is the degree to which the dependent measure assesses what it intends to assess or the manipulation of the independent variable manipulates what it intends to manipulate.