def testLookupPValue_LargeDegreesOfFreedom_LastRowIsUsed(self): # The last row of the table should be used. self.assertEqual(0.02, ttest._LookupPValue(2.365, 100.0))
def testLookupPValue_ZeroTValue_FirstColumnIsUsed(self): # The largest possible p-value will be used when t is zero. self.assertEqual(1.0, ttest._LookupPValue(0.0, 1.0)) self.assertEqual(1.0, ttest._LookupPValue(0.0, 2.0))
def testLookupPValue_SmallTValue_FirstColumnIsUsed(self): # The largest possible p-value will be used when t is almost zero. self.assertEqual(1.0, ttest._LookupPValue(0.1, 2.0)) self.assertEqual(1.0, ttest._LookupPValue(-0.1, 2.0))
def testLookup_DFAndTValueBetweenTwoValues_SmallerRowAndColumnIsUsed(self): self.assertEqual(0.1, ttest._LookupPValue(2.0, 45.0)) self.assertEqual(0.1, ttest._LookupPValue(-2.0, 45.0))
def testLookupPValue_LargeTValue_LastColumnIsUsed(self): # The smallest possible p-value will be used when t is large. self.assertEqual(0.01, ttest._LookupPValue(500.0, 1.0)) self.assertEqual(0.01, ttest._LookupPValue(-500.0, 1.0))
def testLookupPValue_TValueBetweenTwoValues_SmallerColumnIsUsed(self): # The second column is used because 3.1 is below 4.303, # so the next-lowest t-value, 2.920, is used. self.assertEqual(0.2, ttest._LookupPValue(3.1, 2.0)) self.assertEqual(0.2, ttest._LookupPValue(-3.1, 2.0))
def testLookup_DFBetweenTwoValues_SmallerRowIsUsed(self): self.assertEqual(0.05, ttest._LookupPValue(2.228, 45.0)) self.assertEqual(0.05, ttest._LookupPValue(-2.228, 45.0))
def testLookupPValue_LargeDegreesOfFreedom_LastRowIsUsed(self):
# The last row of the table should be used.
self.assertEqual(0.02, ttest._LookupPValue(2.365, 100.0))
def testLookupPValue_ExactMatchInTable(self): """Tests looking up an entry that is in the table.""" self.assertEqual(0.1, ttest._LookupPValue(3.182, 3.0)) self.assertEqual(0.1, ttest._LookupPValue(-3.182, 3.0))
def testLookupPValue_ZeroTValue_FirstColumnIsUsed(self):
# The largest possible p-value will be used when t is zero.
self.assertEqual(1.0, ttest._LookupPValue(0.0, 1.0))
self.assertEqual(1.0, ttest._LookupPValue(0.0, 2.0))
def testLookupPValue_SmallTValue_FirstColumnIsUsed(self):
# The largest possible p-value will be used when t is almost zero.
self.assertEqual(1.0, ttest._LookupPValue(0.1, 2.0))
self.assertEqual(1.0, ttest._LookupPValue(-0.1, 2.0))
def testLookupPValue_LargeTValue_LastColumnIsUsed(self):
# The smallest possible p-value will be used when t is large.
self.assertEqual(0.01, ttest._LookupPValue(500.0, 1.0))
self.assertEqual(0.01, ttest._LookupPValue(-500.0, 1.0))
def testLookup_DFAndTValueBetweenTwoValues_SmallerRowAndColumnIsUsed(self):
self.assertEqual(0.1, ttest._LookupPValue(2.0, 45.0))
self.assertEqual(0.1, ttest._LookupPValue(-2.0, 45.0))
def testLookup_DFBetweenTwoValues_SmallerRowIsUsed(self):
self.assertEqual(0.05, ttest._LookupPValue(2.228, 45.0))
self.assertEqual(0.05, ttest._LookupPValue(-2.228, 45.0))
def testLookupPValue_TValueBetweenTwoValues_SmallerColumnIsUsed(self):
# The second column is used because 3.1 is below 4.303,
# so the next-lowest t-value, 2.920, is used.
self.assertEqual(0.2, ttest._LookupPValue(3.1, 2.0))
self.assertEqual(0.2, ttest._LookupPValue(-3.1, 2.0))
def testLookupPValue_ExactMatchInTable(self):
"""Tests looking up an entry that is in the table."""
self.assertEqual(0.1, ttest._LookupPValue(3.182, 3.0))
self.assertEqual(0.1, ttest._LookupPValue(-3.182, 3.0))