## Self assessment:

For each of the following features, say whether it applies to a Wilcoxon signed-rank test:

- Parametric test.
- Numbers plugged into the formula for the statistic are frequencies.
- Numbers plugged into the formula for the statistic are based on the ranks of the differences between related data in two samples.
- Used on related data.
- Reject the null hypothesis if the calculated statistic is greater than the critical value of the statistic looked up in the table.
- Reject the null hypothesis if
*P*on the SPSS printout is less than 0.05.