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

question 2

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 are the degrees of freedom of the Friedman rank test for the difference in the medians at a level of significance of 0.01?

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Definitions:

Implicit Memory

a type of long-term memory that enables people to perform tasks without conscious awareness of these previous experiences.

Information-Processing Model

A cognitive approach that uses the metaphor of a computer to describe how the human mind manages information through various processes including encoding, storage, and retrieval.

Computer

An electronic device that can be programmed to carry out a set of arithmetic or logical operations automatically.

Testing Method

A process or technique used to evaluate the effectiveness, performance, or reliability of a system, product, or concept.