diff --git a/src/Numerics/GoodnessOfFit/RSquared.cs b/src/Numerics/GoodnessOfFit/RSquared.cs
index 4414b69f..251eff31 100644
--- a/src/Numerics/GoodnessOfFit/RSquared.cs
+++ b/src/Numerics/GoodnessOfFit/RSquared.cs
@@ -1,12 +1,38 @@
-using System;
+// <copyright file="RSquared.cs">
+// Math.NET Numerics, part of the Math.NET Project
+// http://numerics.mathdotnet.com
+// http://github.com/mathnet/mathnet-numerics
+// http://mathnetnumerics.codeplex.com
+//
+// Permission is hereby granted, free of charge, to any person
+// obtaining a copy of this software and associated documentation
+// files (the "Software"), to deal in the Software without
+// restriction, including without limitation the rights to use,
+// copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the
+// Software is furnished to do so, subject to the following
+// conditions:
+//
+// The above copyright notice and this permission notice shall be
+// included in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+// OTHER DEALINGS IN THE SOFTWARE.
+// </copyright>
+
+using System;
 using System.Collections.Generic;
 using System.Linq;
-using System.Text;
-using MathNet.Numerics.LinearAlgebra.Double;
 
 namespace MathNet.Numerics.GoodnessOfFit
 {
-    public class RSquared
+    public static class RSquared
     {
         /// <summary>
         /// Calculated the R-Squared value given modelled and observed values