class_docstr: Unit tests for distributions in continuous.py 
docstr: Computes Mean 
docstr_tok: ["Computes","Mean"]
code: def _compute_mean(self, samples):
      """Computes Mean"""
      return np.mean(samples)
  
file_path: dragonfly/dragonfly/distributions/unittest_nuts.py
imports: from __future__ import absolute_import
  import unittest
  import numpy
  from .continuous import Normal, Beta, Exponential
  from ..utils.base_test_class import BaseTestClass, execute_tests
label_desc: Use image node_id 3 for calling the NutsTestCase obj's underlying member method code with example usage: obj._compute_mean(samples) and returns: np