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
 {
@@ -416,7 +418,7 @@ public void JsonDeserializationTest(string dataSet, int digits, double skewness,
                 NumberHandling = JsonNumberHandling.AllowNamedFloatingPointLiterals,
             };
             var json = JsonSerializer.Serialize(serialize, jsonSerializerOptions);
-            var stats = JsonSerializer.Deserialize<DescriptiveStatistics>(json, jsonSerializerOptions);
+            var stats = JsonSerializer.Deserialize<WeightedDescriptiveStatistics>(json, jsonSerializerOptions);
             Assert.NotNull(stats);
             AssertHelpers.AlmostEqualRelative(data.Mean, stats.Mean, 10);
             AssertHelpers.AlmostEqualRelative(data.StandardDeviation, stats.StandardDeviation, digits);

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