def test_mean_2(self):
     numbers = [4, 4, 4, 4]
     self.assertEqual(mean(numbers), 4)
 def test_mean_3(self):
     numbers = [5, 1, 5, 4, 3, 2, 5, 5, 3, 5]
     self.assertEqual(mean(numbers), 3.8)
 def test_mean_1(self):
     numbers = [1, 5, 3, 2, 4, 3, 3]
     self.assertEqual(mean(numbers), 3)