code: def test_mvn_mvt_2(self):
      a, b = self.a, self.b
      df = self.df
      corr2 = self.corr2
  
      probmvn_R = 0.6472497  # reported error approx. 7.7e-08
      probmvt_R = (
          0.5881863  # highest reported error up to approx. 1.99e-06
      )
      assert_almost_equal(probmvt_R, mvstdtprob(a, b, corr2, df), 4)
      assert_almost_equal(
          probmvn_R, mvstdnormcdf(a, b, corr2, abseps=1e-5), 4
      )
  
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 3 for calling the Test_MVN_MVT_prob obj's underlying member method code with example usage: obj.test_mvn_mvt_2() without return types