class_docstr: Tests ANOVA difference in means
code: def test_anova(self):
      assert_almost_equal(
          self.res1.compute_ANOVA()[:2], self.res2.compute_ANOVA[:2], 4
      )
      assert_almost_equal(
          self.res1.compute_ANOVA()[2], self.res2.compute_ANOVA[2], 4
      )
      assert_almost_equal(
          self.res1.compute_ANOVA(return_weights=1)[3],
          self.res2.compute_ANOVA[3],
          4,
      )
  
file_path: statsmodels/statsmodels/emplike/tests/test_anova.py
imports: import numpy
  from numpy.testing import assert_almost_equal
  from statsmodels.datasets import star98
  from statsmodels.emplike.elanova import ANOVA
  from .results.el_results import ANOVAResults
label_desc: Use image node_id 2 for calling the TestANOVA obj's underlying member method code with example usage: obj.test_anova() without return types