code: def test_skew(self):
      result = pandas_ta.skew(self.close)
      self.assertIsInstance(result, Series)
      self.assertEqual(result.name, "SKEW_30")
  
imports: from .config import error_analysis, sample_data, CORRELATION, CORRELATION_THRESHOLD, VERBOSE
  from .context import pandas_ta
  from unittest import skip, TestCase
  import pandas.testing
  from pandas import DataFrame, Series
  import talib
label_desc: Use image node_id 10 for calling the TestStatistics obj's underlying member method code with example usage: obj.test_skew() without return types