def test_standard_deviation(self): xs = list(range(20)) + list(range(40, 60)) ys = list(range(-40, -20)) + list(range(40, 60)) assert_greater(basic_stats.standard_deviation(ys), basic_stats.standard_deviation(xs))
def standard_deviation(self): if self._cached_sd is not None: return self._cached_sd self._cached_sd = basic_stats.standard_deviation( self._cache, mean=self.mean()) return self._cached_sd
def standard_deviation(self): if self._cached_sd is not None: return self._cached_sd self._cached_sd = basic_stats.standard_deviation(self._cache, mean=self.mean()) return self._cached_sd