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 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
