code: def test_relative_risk_ci_conflevel0():
      result = relative_risk(
          exposed_cases=4,
          exposed_total=12,
          control_cases=5,
          control_total=30,
      )
      rr = result.relative_risk
      assert_allclose(rr, 2.0, rtol=1e-14)
      ci = result.confidence_interval(0)
      assert_allclose((ci.low, ci.high), (2.0, 2.0), rtol=1e-12)
  
file_path: scipy/scipy/stats/tests/test_relative_risk.py
imports: import pytest
  import numpy
  from numpy.testing import assert_allclose, assert_equal
  from scipy.stats.contingency import relative_risk
label_desc: Use image node_id 3 for calling a global function with example usage: test_relative_risk_ci_conflevel0() without return types