From 1063c4e9408a0555c885e8b52f5eb4e3ab582469 Mon Sep 17 00:00:00 2001
From: Jordan Woyak <jordan.woyak@gmail.com>
Date: Tue, 22 Sep 2020 17:44:28 -0500
Subject: [PATCH] MathUtil: Add Population (vs Sample) versions of Variance and
 StandardDeviation to RunningVariance.

---
 Source/Core/Common/MathUtil.h | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/Source/Core/Common/MathUtil.h b/Source/Core/Common/MathUtil.h
index c616b3d74d..5ad9ee0dcd 100644
--- a/Source/Core/Common/MathUtil.h
+++ b/Source/Core/Common/MathUtil.h
@@ -135,8 +135,12 @@ public:
 
   constexpr size_t Count() const { return m_running_mean.Count(); }
   constexpr T Mean() const { return m_running_mean.Mean(); }
+
   constexpr T Variance() const { return m_variance / (Count() - 1); }
-  constexpr T StandardDeviation() const { return std::sqrt(Variance()); }
+  T StandardDeviation() const { return std::sqrt(Variance()); }
+
+  constexpr T PopulationVariance() const { return m_variance / Count(); }
+  T PopulationStandardDeviation() const { return std::sqrt(PopulationVariance()); }
 
 private:
   RunningMean<T> m_running_mean;