TABLE 12-19
an Agronomist Wants to Compare the Crop

question 26

True/False

TABLE 12-19
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.
$$\begin{array} { l l l l } \text { Fields } & \text { Smith } & \text { Walsh } & \text { Trevor } \\1 & 11.1 & 19.0 & 14.6 \\2 & 13.5 & 18.0 & 15.7 \\3 & 15.3 & 19.8 & 16.8 \\4 & 14.6 & 19.6 & 16.7 \\5 & 9.8 & 16.6 & 15.2\end{array}$$ 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$ $\quad \mathrm { DF } = 2 \quad \mathrm { P } = 0.007$

$\begin{array}{lllc} & & \text { Est } & \text { Sum of } \\\text { Varieties } & \mathrm{N} & \text { Median } \\\text { Smith } & 5 & 13.500 & 5.0 \\\text { Trevor } & 5 & 15.667 & 10.0 \\\text { Walsh } & 5 & 18.533 & 15.0 \\\\\text { Grand median }= &15.900\end{array}$

-Referring to Table 12-20, there is sufficient evidence to conclude that the proportions between New York and Paris are different at a 0.05 level of significance.

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Definitions:

Extinction

In behavioral psychology, the gradual weakening and eventual disappearance of a learned response, typically as a result of the withdrawal of reinforcement.

Generalization

A concept in psychology and logic that involves the process of extracting common characteristics from specific examples and applying them to broader contexts.

Operant Conditioning

An educational method where behavior is shaped by either rewarding or penalizing the subject.

Locus Of Control

A personality trait that divides people along a continuum according to the extent to which they believe what happens to them and others is controllable.