diff --git a/FrequencyDistributionTable/ViewModels/MainViewModel.cs b/FrequencyDistributionTable/ViewModels/MainViewModel.cs
index d0cf420..951748c 100644
--- a/FrequencyDistributionTable/ViewModels/MainViewModel.cs
+++ b/FrequencyDistributionTable/ViewModels/MainViewModel.cs
@@ -36,7 +36,7 @@ private void UpdateNonSetProps()
         RaisePropertyChangedEvent(nameof(SampleVariance));
         RaisePropertyChangedEvent(nameof(PopulationVariance));
         RaisePropertyChangedEvent(nameof(SampleStdDeviation));
-
+        RaisePropertyChangedEvent(nameof(PopulationStdDeviation));
     }
 
     public int ClassInterval
@@ -159,6 +159,8 @@ public decimal PopulationVariance
 
     public decimal SampleStdDeviation => (decimal)Math.Sqrt((double)SampleVariance);
 
+    public decimal PopulationStdDeviation => (decimal)Math.Sqrt((double)PopulationVariance);
+
     private decimal GetVarianceNumerator()
     {
         return Classes.Select(x =>