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Population

1. three or more sample

   • Are the samples drawn from a normal distribution?
     • yes
       • paired samples?
         • No
           • one way ANOVA
         • Yes
           • Repeated measures one way ANOVA
     • No
       • paired samples?
         • No
           • Kruskal Wallis test
         • Yes
           • Friedman Test

2. Two sample

   • Are two samples drawn from a normal distribution?
     • Yes
       • Paired samples ?
         • Yes
           • Paired t-test
         • No
           • Equal variance
             • Yes
               • Unpaired t- test
             • No
               • Welch ' corrected unpaired t - test
     • No
       • Paired samples?
         • Yes
         • No