def weighted_moments_normalized(self):
     return _moments.moments_normalized(self.weighted_moments_central, 3)
 def weighted_moments_normalized(self):
     return _moments.moments_normalized(self.weighted_moments_central, 3)
 def moments_normalized(self):
     return _moments.moments_normalized(self.moments_central, 3)
 def moments_normalized(self):
     return _moments.moments_normalized(self.moments_central, 3)