Try the following self-assessment questions. When you have decided on your answer, mouse over the answer button to check:

1. For each of the following features, say whether it applies to a Mann-Whitney U test.

- Parametric test.
- Numbers plugged into the formula for the statistic are frequencies .
- Numbers plugged into the formula for the statistic include the sum of ranks.
- Used for assessing the differences betwen more than two samples.
- Used on unrelated data.
- Reject the null hypothesis if
*P*on the SPSS printout is less than 0.05.