diff --git a/lib/Statistics/XYSampleData.cpp b/lib/Statistics/XYSampleData.cpp
index e455518..bdb4f19 100644
--- a/lib/Statistics/XYSampleData.cpp
+++ b/lib/Statistics/XYSampleData.cpp
@@ -20,7 +20,6 @@
 #include <LatAnalyze/Statistics/XYSampleData.hpp>
 #include <LatAnalyze/includes.hpp>
 #include <LatAnalyze/Core/Math.hpp>
-// #include <LatAnalyze/Core/Exceptions.hpp>
 
 using namespace std;
 using namespace Latan;
@@ -235,17 +234,17 @@ DVec XYSampleData::getYError(const Index j)
     return data_.getYError(j);
 }
 
-void XYSampleData::setChi2PerDofBound(double uLim, double lLim)
+void XYSampleData::setPValueBound(double uLim, double lLim)
 {
-    chi2PerDofu_ = uLim;
-    chi2PerDofl_ = lLim;
+    pValMax = uLim;
+    pValMin = lLim;
 }
 
-void XYSampleData::checkChi2PerDof(double Chi2PerDof)
+void XYSampleData::checkPValue(double pValue)
 {
-    if(Chi2PerDof >= chi2PerDofu_ or Chi2PerDof < chi2PerDofl_ or isnan(Chi2PerDof)) 
+    if(pValue >= pValMax or pValue <= pValMin or isnan(pValue)) 
     {
-        string msg = "central chi2perDof = " + to_string(Chi2PerDof) + " not within user-set bound of " + to_string(chi2PerDofl_) + " < chi2PerDof < " + to_string(chi2PerDofu_) ;
+        string msg = "central pValue = " + to_string(pValue) + " not within user-set bound of " + to_string(pValMin) + " < pValue < " + to_string(pValMax) ;
         LATAN_ERROR(Runtime, msg);
     }
 }
diff --git a/lib/Statistics/XYSampleData.hpp b/lib/Statistics/XYSampleData.hpp
index 5109b6c..f6bcb5f 100644
--- a/lib/Statistics/XYSampleData.hpp
+++ b/lib/Statistics/XYSampleData.hpp
@@ -92,8 +92,8 @@ public:
     DVec               getXError(const Index i);
     DVec               getYError(const Index j);
     // fit criteria
-    void               setChi2PerDofBound(double uLim, double lLim);
-    void               checkChi2PerDof(double Chi2PerDof);
+    void               setPValueBound(double uLim, double lLim);
+    void               checkPValue(double Chi2PerDof);
     // get total fit variance matrix and its pseudo-inverse
     const DMat & getFitVarMat(void);
     const DMat & getFitVarMatPInv(void);
@@ -136,7 +136,7 @@ private:
     Index                                 nSample_, dataSample_{central};
     bool                                  initData_{true}, computeVarMat_{true};
     bool                                  initXMap_{true};
-    double                                chi2PerDofu_{1e10}, chi2PerDofl_{0};
+    double                                pValMax{1}, pValMin{0};
 };
 
 /******************************************************************************