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

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