docs: @Override
      public boolean isWithin(double delta)
      {
          readLock.lock();
          try
          {
              if (average.getCount() > min.getInitialSize())
              {
                  return (deviation() < delta);
              }
              else
              {
                  return false;
              }
          }
          finally
          {
              readLock.unlock();
          }
      }