The Significance Level for a Wilcoxon Signed Rank Sum Test

Short Answer

The significance level for a Wilcoxon signed rank sum test is 0.05. The alternative hypothesis is stated as: The location of population 1 is left to the location of population 2. The appropriate critical values for a sample of size 20 (that is the number of nonzero differences is 20) are: $\begin{array}{|l|l|}\hline\text { A. } & 60,150 . \\\hline \text { B. } & 52,150 . \\\hline \text { C. } & 60,158 . \\\hline \text { D. } & 52,158 . \\\hline\end{array}$