Instruction 19-7
an Agronomist Wants to Compare the Crop Yield

question 38

Short Answer

Instruction 19-7
An agronomist wants to compare the crop yield of three varieties of chickpea seeds.She plants all three varieties of the seeds on each of five different patches of fields.She then measures the crop yield in bushels per acre.Treating this as a randomised block design,the results are presented in the table that follows.
$$\begin{array} { | l | l | l | l | } \hline 1 e l d s & \text { Smith } & \text { Walsh } & \text { Trevor } \\\hline 1 & 11.1 & 19.0 & 14.6 \\\hline 2 & 13.5 & 18.0 & 15.7 \\\hline 3 & 15.3 & 19.8 & 16.8 \\\hline 4 & 14.6 & 19.6 & 16.7 \\\hline 5 & 9.8 & 16.6 & 15.2 \\\hline\end{array}$$ Below is the Minitab output of the Friedman rank test:
Friedman Test: Yield versus Varieties, Fields
Friedman test for Yield by Varieties blocked by Fields
$\mathrm { S } = 10.00 \mathrm { DF } = 2 \mathrm { P } = 0.007$
$\begin{array} { l l l l } & & \text { Est } & \text { Sum of } \\ \text { Varieties } & \mathrm { N } & \text { Median } & \text { Ranks } \\\\\text { Smith } & 5 & 13.500 & 5.0 \\ \text { Trevor } & 5 & 15.667 & 10.0 \\ \text { Walsh } & 5 & 18.533 & 15.0 \end{array}$
Grand median = 15.900
-Referring to Instruction 19-7,what is the value of the test statistic for the Friedman rank test for the difference in the medians?

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Definitions:

Attachment Pattern

The characteristic way in which individuals form and maintain emotional bonds with others, often influenced by early relationships with caregivers.

Reactive Attachment Disorder

A serious condition in which an infant or young child fails to establish healthy attachments with parents or caregivers due to severe neglect or mistreatment.

Ambivalent Attachment Syndrome

A pattern of insecure attachment where individuals remain uncertain and anxious about their caregiver's availability and responsiveness.

Psychodynamic Perspective

The approach stating that behavior is motivated by inner forces, memories, and conflicts that are generally beyond people’s awareness and control.