class_docstr: Tests ANOVA difference in means
code: def setup_class(cls):
      cls.data = np.asarray(star98.load().exog)[:30, 1:3]
      cls.res1 = ANOVA([cls.data[:, 0], cls.data[:, 1]])
      cls.res2 = ANOVAResults()
  
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 1 for calling the TestANOVA obj's underlying member method code with example usage: obj.setup_class(cls) without return types