code: def pooled_variance(self, other: "RunningStatsArray") -> np.array:
      return (self.variance() * self.n + other.variance() * other.n) / (
          self.n + other.n
      )
  
file_path: scattertext/scattertext/contextual_embeddings/running_stats_array.py
imports: import numpy
label_desc: Use image node_id 7 for calling the RunningStatsArray obj's underlying member method code with example usage: obj.pooled_variance(other) and returns: unknown