Friedman's Test

Friedman's Test

1. Does not assume

   • Normal Distribution
   • Equal Variances

2. Extension of Wilcoxon signed rank test

3. Distribution approximates chi-square

4. is

   • Rank based non-parametric test
   • Alternate to repeated ANOVA
   • Not as powerful as ANOVA
   • Less sensitive to outliers

5. Assumes

   • Observations are independent
   • Random sample from population