Wilcoxon Signed rank Test Out put result and how to report it

Reporting the output of the Wilcoxon signed-rank test

When you report the output of your Wilcoxon signed-rank test, it is good practice to include:

• A. An introduction to the analysis you carried out.
• B. Information about your sample, including how many participants were in each group of your two related groups (N.B., this is particularly useful if the group sizes were unequal or there were missing values).
• C. A statement of whether there were statistically significant differences between your two related groups, including the relevant median difference (Estimated Median), Wilcoxon signed-rank test statistic, W (Wilcoxon Statistic), and significance level, or more specifically, the 2-tailed p-value (P).

Based on the Minitab output above, we could report the results of this study as follows:

• General

Twenty participants were recruited to understand the performance benefits of a carbohydrate-protein versus carbohydrate-only drink on running performance as measured by the distance run in two hours on a treadmill. Data are medians unless otherwise stated. A Wilcoxon signed-rank test determined that there was a statistically significant median increase in distance run (0.135 km) when subjects imbibed the carbohydrate-protein drink compared to the carbohydrate-only drink, W = 169.5, p < .0005.