code: def setup_class(cls):
      covx = np.array([[1.0, 0.5], [0.5, 1.0]])
      mu3 = [-1, 0.0, 2.0]
      cov3 = np.array(
          [[1.0, 0.5, 0.75], [0.5, 1.5, 0.6], [0.75, 0.6, 2.0]]
      )
      cls.mu3 = mu3
      cls.cov3 = cov3
  
      mvn3 = MVNormal(mu3, cov3)
      mvn3c = MVNormal(np.array([0, 0, 0]), cov3)
      cls.mvn3 = mvn3
      cls.mvn3c = mvn3c
  
file_path: statsmodels/statsmodels/sandbox/distributions/tests/test_multivariate.py
imports: import numpy
  from numpy.testing import assert_almost_equal, assert_allclose
  from statsmodels.sandbox.distributions.multivariate import mvstdtprob, mvstdnormcdf
  from statsmodels.sandbox.distributions.mv_normal import MVT, MVNormal
label_desc: Use image node_id 1 for calling the TestMVDistributions obj's underlying member method code with example usage: obj.setup_class(cls) without return types