
To test the statistical significance of the difference between... 

Two or more proportions  Chisquare  Nonparametric 
Two proportions  Fisher’s exact  Parametric 
Two medians  MannWhitney  Nonparametric 
Two means  Student  Parametric 
More than two means  KruskalWallis (onefactor)  Nonparametric 
Two or more than two variances  Bartlett  Parametric 
More than two means  ANOVA (onefactor)  Parametric 
More than two means  ANOVA (morefactors)  Parametric 
To test the correlation between two variables  Spearman’s rank correlation test  Nonparametric 
To test the correlation between two variables  Pearson’s correlation test  Parametric 
