public override int GetHashCode()
 {
     unchecked
     {
         int hashCode = Estimation.GetHashCode();
         hashCode = (hashCode * 397) ^ Lower.GetHashCode();
         hashCode = (hashCode * 397) ^ Upper.GetHashCode();
         hashCode = (hashCode * 397) ^ ConfidenceLevel.GetHashCode();
         return(hashCode);
     }
 }