Chi-squared
Test of difference
Independent design
Nominal data
Sign test
Test of difference
Repeated measures/ matched pairs
Nominal data
Mann-Whitney
Difference
Independent design
At least ordinal data
Wilcoxon test
Difference
Repeated measures / matched pairs
At least ordinal
Greater than critical value
Chi-squared
Spearman’s rank
Lesser than critical value
Mann-Whitney
Sign
Wilcoxon