code: def test_get_statistics():
      """Test statistics computation of this dataset."""
      solubility_dataset = load_solubility_data()
      X, y, _, _ = (
          solubility_dataset.X,
          solubility_dataset.y,
          solubility_dataset.w,
          solubility_dataset.ids,
      )
      X_means, y_means = np.mean(X, axis=0), np.mean(y, axis=0)
      X_stds, y_stds = np.std(X, axis=0), np.std(y, axis=0)
      (
          comp_X_means,
          comp_X_stds,
          comp_y_means,
          comp_y_stds,
      ) = solubility_dataset.get_statistics()
      np.testing.assert_allclose(comp_X_means, X_means)
      np.testing.assert_allclose(comp_y_means, y_means)
      np.testing.assert_allclose(comp_X_stds, X_stds)
      np.testing.assert_allclose(comp_y_stds, y_stds)
  
imports: import random
  import math
  import unittest
  import os
  import numpy
  import pytest
  import deepchem
  import pandas
  import tempfile
label_desc: Use image node_id 18 for calling a global function with example usage: test_get_statistics() without return types