def testStdDev(self): xs = [1, 2, 3] expected = (1 + 0 + 1) / 2 self.assertAlmostEqual(tsc_stats.stddev(xs), expected, 0.01)
def testStdDevNoVariance(self): xs = [2, 2, 2] self.assertAlmostEqual(tsc_stats.stddev(xs), 0, 0.01)