Ten different families are tested for the number of litres of water a week they use before and after viewing a conservation video.Do the data suggest that the amount after the viewing differs from the amount before the viewing? Perform a Wilcoxon signed rank test at the 5% significance level. $$\begin{array} { c | c c c c c c c c c c }
\hline \text { Before } & 33 & 33 & 38 & 33 & 35 & 35 & 40 & 40 & 40 & 31 \
\hline \text { After } & 34 & 28 & 25 & 28 & 35 & 33 & 31 & 28 & 35 & 33 \
\hline \mathbf { B } - \mathbf { A } & - 1 & 5 & 13 & 5 & 0 & 2 & 9 & 12 & 5 & - 2 \
\hline
\end{array}$$

Question

Ten different families are tested for the number of litres of water a week they use before and after viewing a conservation video.Do the data suggest that the amount after the viewing differs from the amount before the viewing? Perform a Wilcoxon signed rank test at the 5% significance level. $$\begin{array} { c | c c c c c c c c c c } 
\hline \text { Before } & 33 & 33 & 38 & 33 & 35 & 35 & 40 & 40 & 40 & 31 \
\hline \text { After } & 34 & 28 & 25 & 28 & 35 & 33 & 31 & 28 & 35 & 33 \
\hline \mathbf { B } - \mathbf { A } & - 1 & 5 & 13 & 5 & 0 & 2 & 9 & 12 & 5 & - 2 \
\hline
\end{array}$$

Quizplus · Accepted Answer

The Answer of Ten different families are tested for the number of litres of water a week they use before and after viewing a conservation video.Do the data suggest that the amount after the viewing differs from the amount before the viewing? Perform a Wilcoxon signed rank test at the 5% significance level. $$\begin{array} { c | c c c c c c c c c c } 
\hline \text { Before } & 33 & 33 & 38 & 33 & 35 & 35 & 40 & 40 & 40 & 31 \
\hline \text { After } & 34 & 28 & 25 & 28 & 35 & 33 & 31 & 28 & 35 & 33 \
\hline \mathbf { B } - \mathbf { A } & - 1 & 5 & 13 & 5 & 0 & 2 & 9 & 12 & 5 & - 2 \
\hline
\end{array}$$

Ten Different Families Are Tested for the Number of Litres