Verbal SAT scores for students randomly selected from two different schools are listed below. Use the Wilcoxon rank sum test to find R to test the claim that there is no difference in the scores from each school. $\begin{array}{ccc|ccc}
{\text { School 1 }} &&&{\text { School 2 }} \
\hline 580 & 550 & 800 & 520 & 470 & 710 \
510 & 780 & 560 & 460 & 740 & 620 \
610 & 810 & 640 & 720 & 580 & 560 \
620 & 760 & 780 & 660 & 670 & 570
\end{array}$

A)128.5
B)171.5
C)75.5
D)38.5

Question

Verbal SAT scores for students randomly selected from two different schools are listed below. Use the Wilcoxon rank sum test to find R to test the claim that there is no difference in the scores from each school. $\begin{array}{ccc|ccc}
{\text { School 1 }} &&&{\text { School 2 }} \
\hline 580 & 550 & 800 & 520 & 470 & 710 \
510 & 780 & 560 & 460 & 740 & 620 \
610 & 810 & 640 & 720 & 580 & 560 \
620 & 760 & 780 & 660 & 670 & 570
\end{array}$

A)128.5
B)171.5
C)75.5
D)38.5

Quizplus · Accepted Answer

The Wilcoxon rank sum test involves ranking all the scores together and then summing the ranks for one of the groups. The sum of ranks for School 1 is 128.5.

Verbal SAT Scores for Students Randomly Selected from Two Different