Given the Following Data,calculate the Mann-Whitney Statistic U for the Stream

Multiple Choice

Given the following data,calculate the Mann-Whitney statistic U for the stream draining the boreal forest. $\begin{array} { | l | l | l | l | } \hline \text { Measurements(deciduous) } & \text { Ranks } & \text { Measurements(boreal) } & \text { Ranks } \\\hline 13.1 & 1 & 100.9 & 7 \\\hline 16.9 & 2 & 111.2 & 8 \\\hline 24.2 & 3 & 113.5 & 9 \\\hline 30.6 & 4 & 151.1 & 10 \\\hline 32.8 & 5 & 172.3 & 11 \\\hline 41.1 & 6 & 206.6 & 12 \\\hline 218.8 & 13 & 442.4 & 14 \\\hline n _ { d } = 7 & T _ { d } = 34 & n _ { b } = 7 & T _ { b } = 71 \\\hline\end{array}$

A) 6
B) 7
C) 41
D) 43
E) None of the choices are correct.