code: def test_multidimensional(test_vals):
      assert_almost_equal(
          cum2mc(mnc2cum(mc2mnc(test_vals).T).T).T, test_vals
      )
      assert_almost_equal(cum2mc(mc2cum(test_vals).T).T, test_vals)
      assert_almost_equal(mvsk2mc(mc2mvsk(test_vals).T).T, test_vals)
  
file_path: statsmodels/statsmodels/stats/tests/test_moment_helpers.py
imports: import numpy
  import pytest
  from numpy.testing import assert_almost_equal, assert_, assert_equal
  from statsmodels.stats import moment_helpers
  from statsmodels.stats.moment_helpers import cov2corr, mvsk2mc, mc2mvsk, mnc2mc, mc2mnc, cum2mc, mc2cum, mnc2cum
label_desc: Use image node_id 3 for calling a global function with example usage: test_multidimensional(test_vals) without return types