To Compare the Cost of Three Shipping Methods, a Firm $\quad$

question 40

Multiple Choice

To compare the cost of three shipping methods, a firm shipped five orders to each of four different destinations over a six-month period. Their total shipping costs are shown below.
$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\quad$$\text { Destination }$
$\begin{array}{l} \text { Shipper } & \text { Toledo } & \text { Oshawa } & \text { Janesville } & \text { Dallas } \\\text { Speedyship }& 355 & 435 & 422 & 518 \\\text { GetItThere } &342 & 441 & 402 & 488\\\text { WeRTops}& 361 & 430 & 435 & 528 \end{array}$
Which nonparametric test would you use to compare the median shipping costs among destinations and among shippers?

• A)Friedman test
• B)Kruskal-Wallis test
• C)Wilcoxon rank sum (Mann-Whitney) test
• D)Lebesgue-Stieltjes test

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Definitions:

Parameter

A measurable characteristic that describes an aspect of a population in statistical analysis.

Standard Deviation

A statistical analysis tool that calculates the spread of a dataset relative to its mean.

Population Standard Deviation

A measure of dispersion of a population's values.