docstr: Predictions data for eight schools.
docstr_tok: ["Predictions","data","for","eight","schools","."]
code: def predictions_params(self):
      """Predictions data for eight schools."""
      return {
          "J": 8,
          "sigma": np.array([5.0, 7.0, 12.0, 4.0, 6.0, 10.0, 3.0, 9.0]),
      }
  
file_path: arviz/arviz/tests/external_tests/test_data_numpyro.py
imports: from collections import namedtuple
  import numpy
  import pytest
  from ...data.io_numpyro import from_numpyro
  from ..helpers import chains, check_multiple_attrs, draws, eight_schools_params, importorskip, load_cached_models
label_desc: Use image node_id 2 for calling the TestDataNumPyro obj's underlying member method code with example usage: obj.predictions_params() and returns: dict