code: def test_large_ntop(df):
      res = Description(df, ntop=15)
      assert "top_15" in res.frame.index
  
file_path: statsmodels/statsmodels/stats/tests/test_descriptivestats.py
imports: import numpy
  from numpy.testing import assert_almost_equal, assert_equal
  import pandas
  import scipy.stats
  import pytest
  from statsmodels.iolib.table import SimpleTable
  from statsmodels.stats.descriptivestats import Description, describe, sign_test
label_desc: Use image node_id 6 for calling a global function with example usage: test_large_ntop(df) without return types