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Diffstat (limited to 'Lib/test/test_statistics.py')
| -rw-r--r-- | Lib/test/test_statistics.py | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/Lib/test/test_statistics.py b/Lib/test/test_statistics.py index a9a427b..5b8ad87 100644 --- a/Lib/test/test_statistics.py +++ b/Lib/test/test_statistics.py @@ -2029,6 +2029,10 @@ class TestVariance(VarianceStdevMixin, NumericTestCase, UnivariateTypeMixin): self.assertEqual(result, exact) self.assertIsInstance(result, Decimal) + def test_center_not_at_mean(self): + data = (1.0, 2.0) + self.assertEqual(self.func(data), 0.5) + self.assertEqual(self.func(data, xbar=2.0), 1.0) class TestPStdev(VarianceStdevMixin, NumericTestCase): # Tests for population standard deviation. @@ -2041,6 +2045,11 @@ class TestPStdev(VarianceStdevMixin, NumericTestCase): expected = math.sqrt(statistics.pvariance(data)) self.assertEqual(self.func(data), expected) + def test_center_not_at_mean(self): + # See issue: 40855 + data = (3, 6, 7, 10) + self.assertEqual(self.func(data), 2.5) + self.assertEqual(self.func(data, mu=0.5), 6.5) class TestStdev(VarianceStdevMixin, NumericTestCase): # Tests for sample standard deviation. @@ -2058,6 +2067,9 @@ class TestStdev(VarianceStdevMixin, NumericTestCase): expected = math.sqrt(statistics.variance(data)) self.assertEqual(self.func(data), expected) + def test_center_not_at_mean(self): + data = (1.0, 2.0) + self.assertEqual(self.func(data, xbar=2.0), 1.0) class TestGeometricMean(unittest.TestCase): |