code: def get_interval(self):
      two_tailed_z = scipy.stats.norm.ppf(
          1 - (BiasConfidence.alpha / 2)
      )
      return two_tailed_z * self.standard_error
  
imports: import numpy
  import scipy.stats
label_desc: Use image node_id 2 for calling the BiasConfidence obj's underlying member method code with example usage: obj.get_interval() and returns: unknown