def testBasic(self):
self.assertAlmostEqual(
mann_whitney_u.MannWhitneyU(range(10), range(20, 30)),
0.00018267179110955002)
self.assertAlmostEqual(
mann_whitney_u.MannWhitneyU(range(5), range(10)),
0.13986357686781267)
def _CompareValues(values_a, values_b):
if not (values_a and values_b):
return _UNKNOWN
try:
p_value = mann_whitney_u.MannWhitneyU(values_a, values_b)
except ValueError:
return _UNKNOWN
if p_value < _SIGNIFICANCE_LEVEL:
return _DIFFERENT
else:
return _UNKNOWN
def _CompareResults(results_a, results_b):
if len(results_a) == 0 or len(results_b) == 0:
return _UNKNOWN
try:
p_value = mann_whitney_u.MannWhitneyU(results_a, results_b)
except ValueError:
return _UNKNOWN
if p_value < _SIGNIFICANCE_LEVEL:
return _DIFFERENT
else:
return _UNKNOWN
def testAllValuesIdentical(self):
with self.assertRaises(ValueError):
mann_whitney_u.MannWhitneyU([0] * 5, [0] * 5)
def testSmallSamples(self):
self.assertEqual(mann_whitney_u.MannWhitneyU([0], [1]), 1.0)
def testDuplicateValues(self):
self.assertAlmostEqual(mann_whitney_u.MannWhitneyU([0] * 5, [1] * 5),
0.0039767517097886512)