How many of the following statements are TRUE?

1. We can apply nonparametric tests to problems involving interval or ratio data.
2. We can apply parametric tests, such as thet-test, to ordinal or ranked level of measurement.
3. The Wilcoxon rank-sum test computes az-test statistic.
4. The test statistic for the null hypothesis that the correlation among the ranks is equal to zero is a chi-square statistic.
5. The Wilcoxon signed-rank test of differences requires that the data be at least ordinal scaled and that the two samples be related.