anchor.diff:              FSharp.Stats.Testing.TestStatistics.createFTest statistic df1 df2 
           else
               let statistic = var2 / var1
  -            FSharp.Stats.Testing.TestStatistics.createFTest statistic df2 df1+            FSharp.Stats.Testing.TestStatistics.createFTest statistic df2 df1
  
positive.code:             let statistic = var2 / var1
              Testing.TestStatistics.createFTest statistic df2 df1
  
      /// F-Test to compare two variances from given parameters.
      let testVariancesFromVarAndDof (var1:float,df1:float) (var2:float,df2:float)  =
          if df1 = 0. || df2 = 0. then failwithf "Degrees of freedom cannot be zero."
          if var1 > var2 then 
  
negative.code: 
      open FSharp.Stats
  
      /// F-test to compare two variances from data.
      let testVariances (data1:Vector<float>) (data2:Vector<float>) = 
          if data1.Length = 0 || data2.Length = 0 then failwithf "Data cannot be empty."
          let var1 = Seq.var data1
          let var2 = Seq.var data2
  