Suppose That Six Different E-Readers Were Evaluated by Two Senior

question 12

Multiple Choice

Suppose that six different e-readers were evaluated by two senior citizen groups
With respect to their suitability for use among the older segment of the population. The
Rankings from 1 (best) to 6 (worst) are shown below. To determine if there is a difference
In the rankings between the two magazines, the appropriate nonparametric method is the $$\begin{array} { | c | c | c | } \hline \text { Model } & \text { Group 1 } & \text { Group 2 } \\\hline \text { Kindle 3 } & 1 & 1 \\\hline \text { Sony Reader } & 2 & 3 \\\hline \text { Kindle DX } & 3 & 2 \\\hline \text { Alex } & 4 & 6 \\\hline \text { Kobo eReader } & 5 & 4 \\\hline \text { COOL-ER } & 6 & 5 \\\hline\end{array}$$

• A) Wilcoxon Rank-Sum test.
• B) Wilcoxon Signed-Rank test.
• C) Spearman's rho.
• D) Kruskal Wallis test.
• E) Kendall's tau.

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Definitions:

Protoplasts

Plant, bacterial, or fungal cells with the cell wall removed, leaving the plasma membrane, cytoplasm, and organelles intact.

Transgenic Plants

Plants that have been genetically modified to contain and express genes from other species.

Cell Wall

A rigid layer that lies outside the cell membrane of plants, fungi, and bacteria, providing structural support and protection.

Human Genome Project

an international scientific research project with the goal of determining the sequence of nucleotide base pairs that make up human DNA, and of identifying and mapping all of the genes of the human genome.