Fix build

Author: cdrnet

src/Numerics.Tests/StatisticsTests/RunningWeightedStatisticsTests.cs

@@ -32,6 +32,8 @@
 using MathNet.Numerics.Distributions;
 using MathNet.Numerics.Random;
 using MathNet.Numerics.Statistics;
+using MathNet.Numerics.Tests;
+using MathNet.Numerics.Tests.StatisticsTests;
 using NUnit.Framework;
 
 namespace MathNet.Numerics.UnitTests.StatisticsTests

src/Numerics.Tests/StatisticsTests/WeightedDescriptiveStatisticsTests.cs

@@ -36,6 +36,8 @@
 #endif
 using NUnit.Framework;
 using MathNet.Numerics.Statistics;
+using MathNet.Numerics.Tests;
+using MathNet.Numerics.Tests.StatisticsTests;
 
 namespace MathNet.Numerics.UnitTests.StatisticsTests
 {

src/Numerics/Statistics/WeightedDescriptiveStatistics.cs

@@ -111,7 +111,7 @@ public WeightedDescriptiveStatistics(IEnumerable<(double, double)> data, bool in
         /// <remarks>
         /// Used for Json serialization
         /// </remarks>
-        public DescriptiveStatistics()
+        public WeightedDescriptiveStatistics()
         {
         }
 #endif