diff --git a/utils/regr/regr_sxx.cpp b/utils/regr/regr_sxx.cpp
index 0903148dc..beacf14d4 100644
--- a/utils/regr/regr_sxx.cpp
+++ b/utils/regr/regr_sxx.cpp
@@ -125,14 +125,11 @@ mcsv1_UDAF::ReturnCode regr_sxx::subEvaluate(mcsv1Context* context, const UserDa
 mcsv1_UDAF::ReturnCode regr_sxx::evaluate(mcsv1Context* context, static_any::any& valOut)
 {
     struct regr_sxx_data* data = (struct regr_sxx_data*)context->getUserData()->data;
-    double N = data->cnt;
+    long double N = data->cnt;
     if (N > 0)
     {
-        long double sumx = data->sumx;
-        long double sumx2 = data->sumx2;
-
-        long double var_popx = (sumx2 - (sumx * sumx / N)) / N;
-        valOut = static_cast<double>(N * var_popx);
+        long double var_popx = (data->sumx2 - (data->sumx * data->sumx / N));
+        valOut = static_cast<double>(var_popx);
     }
     return mcsv1_UDAF::SUCCESS;
 }
diff --git a/utils/regr/regr_sxy.cpp b/utils/regr/regr_sxy.cpp
index 092d3c375..cad3e69eb 100644
--- a/utils/regr/regr_sxy.cpp
+++ b/utils/regr/regr_sxy.cpp
@@ -142,15 +142,10 @@ mcsv1_UDAF::ReturnCode regr_sxy::subEvaluate(mcsv1Context* context, const UserDa
 mcsv1_UDAF::ReturnCode regr_sxy::evaluate(mcsv1Context* context, static_any::any& valOut)
 {
     struct regr_sxy_data* data = (struct regr_sxy_data*)context->getUserData()->data;
-    double N = data->cnt;
+    long double N = data->cnt;
     if (N > 0)
     {
-        long double sumx = data->sumx;
-        long double sumy = data->sumy;
-        long double sumxy = data->sumxy;
-
-        long double covar_pop = (sumxy - ((sumx * sumy) / N)) / N;
-        long double regr_sxy = data->cnt * covar_pop;
+        long double regr_sxy = (data->sumxy - ((data->sumx * data->sumy) / N));
         valOut = static_cast<double>(regr_sxy);
     }
     return mcsv1_UDAF::SUCCESS;
diff --git a/utils/regr/regr_syy.cpp b/utils/regr/regr_syy.cpp
index 0fc3102ed..4f9797663 100644
--- a/utils/regr/regr_syy.cpp
+++ b/utils/regr/regr_syy.cpp
@@ -128,11 +128,8 @@ mcsv1_UDAF::ReturnCode regr_syy::evaluate(mcsv1Context* context, static_any::any
     long double N = data->cnt;
     if (N > 0)
     {
-        long double sumy = data->sumy;
-        long double sumy2 = data->sumy2;
-
-        long double var_popy = (sumy2 - (sumy * sumy / N)) / N;
-        valOut = static_cast<double>(N * var_popy);
+        long double var_popy = (data->sumy2 - (data->sumy * data->sumy / N));
+        valOut = static_cast<double>(var_popy);
     }
     return mcsv1_UDAF::SUCCESS;
 }