docstr: Mixture of 3 normal distributions.
docstr_tok: ["Mixture","of","3","normal","distributions","."]
code: def test_normal(self):
      """Mixture of 3 normal distributions."""
      probs = np.array([0.2, 0.3, 0.5], np.float32)
      loc = np.array([1.0, 5.0, 7.0], np.float32)
      scale = np.array([1.5, 1.5, 1.5], np.float32)
  
      self._test(probs, {"loc": loc, "scale": scale}, Normal)
  
file_path: edward/tests/models/param_mixture_stats_test.py
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import edward
  import numpy
  import tensorflow
  from edward.models import Beta, Normal, ParamMixture
label_desc: Use image node_id 2 for calling the test_param_mixture_class obj's underlying member method code with example usage: obj.test_normal() without return types