code: def conf_int(self):
      return [
          (-341.6373, 235.6502),
          (0.0038583, 0.1382881),
          (-1.354241, 0.5073086),
          (-1.194199, 0.0490617),
          (-1.130071, 0.3016637),
          (9.003248, 87.83247),
      ]
  
file_path: statsmodels/statsmodels/regression/tests/results/results_regression.py
imports: import numpy
label_desc: Use image node_id 2 for calling the LongleyRTO obj's underlying member method code with example usage: obj.conf_int() and returns: list