Consider the following four characteristic of a particular non-parametric test .

1. Requires bivariate data, ie. matched data pairs
2. Can be used with nominal data
3. Test statistic is the sum of values designated with a ( + )
4. Uses the binomial distribution with p= 0.50 to establish critical values
5. Ties within each matched pair are ignored when determining sample size

This test is the ________ test

a) Binomial b) Wilcoxon Signed Ranks c)Kruskal-Wallis d) Sign