diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -6,5 +6,9 @@
 
 ## 0.1.1.0 -- 2020-09-19
 
-* First version revised. Fixed issues with not importing from GHC.Prim fabsFloat# for GHC lower than 8.2* versions. Removed functions that used Neumaier summation because
+* First version revised A. Fixed issues with not importing from GHC.Prim fabsFloat# for GHC lower than 8.2* versions. Removed functions that used Neumaier summation because
 they do not have the intended behaviour. 
+
+## 0.1.2.0 -- 2020-09-19
+
+* First version revised B. Removed the functions that compute mean with dispersion using unlifted types, because of numeric inaccuracy. 
diff --git a/Numeric/Stats.hs b/Numeric/Stats.hs
--- a/Numeric/Stats.hs
+++ b/Numeric/Stats.hs
@@ -30,13 +30,6 @@
   where m0 !s3 !l2 !x = (s3 + x) / (l2 + 1)
 meanWithDispersion _ _ _ _ !m !d = (m,d)
 
-meanWithDispersionF :: [Float] -> Float# -> Float# -> Float# -> Float# -> Float# -> (Float,Float)
-meanWithDispersionF ((F# !x):xs) !s1 !s2 !l1 m1 d = 
- meanWithDispersionF xs (plusFloat# s1 x) (plusFloat# s2 (powerFloat# x 2.0#)) (plusFloat# l1 1.0#) (m0 s1 l1 x) 
-   (m0 s2 l1 (minusFloat# (powerFloat# x 2.0#) (powerFloat# (m0 s1 l1 x) 2.0#)))
-      where m0 !s3 !l2 !x = (divideFloat# (plusFloat# s3 x) (plusFloat# l2 1.0#))
-meanWithDispersionF _ _ _ _ !m !d = (F# m, F# d)
-
 -- | A tail-recursive realization for the statistic mean. A variant of the 'mean2' function. 
 mean :: RealFrac a => [a] -> a
 mean xs = mean2 xs 0.0 0.0 0.0
@@ -50,7 +43,3 @@
 meanWithDisp :: (RealFrac a, Floating a) => [a] -> (a,a)
 meanWithDisp xs = meanWithDispersion xs 0.0 0.0 0.0 0.0 0.0
 {-# INLINE meanWithDisp #-}
-
-meanWithDispF :: [Float] -> (Float, Float)
-meanWithDispF xs = meanWithDispersionF xs 0.0# 0.0# 0.0# 0.0# 0.0#
-{-# INLINE meanWithDispF #-}
diff --git a/uniqueness-periods-vector-stats.cabal b/uniqueness-periods-vector-stats.cabal
--- a/uniqueness-periods-vector-stats.cabal
+++ b/uniqueness-periods-vector-stats.cabal
@@ -2,7 +2,7 @@
 -- For further documentation, see http://haskell.org/cabal/users-guide/
 
 name:                uniqueness-periods-vector-stats
-version:             0.1.1.0
+version:             0.1.2.0
 synopsis:            A very basic descriptive statistics.
 description:         A very basic descriptive statistics. Functions use a tail recursion approach to compute the values and are strict by an accumulator.
 homepage:            https://hackage.haskell.org/package/uniqueness-periods-vector-stats