def testChebyshevInequalityreturnCI(self):
list = [1, 2, 3, 4, 5]
stat = Statistics(list)
actual = stat.chebyshevInequality()
expected = 0.5000000000000001
self.assertEqual(expected, actual)
def testChebyshevInequalityreturnNone(self):
emptyList = []
stat = Statistics(emptyList)
actual = stat.chebyshevInequality()
expected = None
self.assertEqual(expected, actual)