Non-Parametric Tests of Difference

Non-Parametric Tests of Difference

1. Wilcoxon test for related designs

   • Hypothesis states difference between two sets of data
   • Related design (repeated measures of matched pairs)
   • Data is ordinal

2. Mann-whitney test for unrelated designs

   • Hypothesis states difference between two sets of data
   • Unrelated design (independent groups)
   • Data is ordinal

3. Sign test

   • Hypothesis states difference between two sets of data
   • Related design (repeated measures or matched pairs)
   • Data is nominal

4. Chi-squared test

   • Hypothesis states difference between two sets of data
   • Data in each cell is independent
   • Data is nominal