def test_zscore_means_to_zero(): x = [1, 2, 3, 4, 5, 6, 3, 2, 4, 5, 3, 2, 3, 4] out = stats.z_score(x) assert abs(out.mean() - 0) < 1e-6
def test_zscore_sd_to_1(): x = [1, 2, 3, 4, 5, 6, 3, 2, 4, 5, 3, 2, 3, 4] out = stats.z_score(x) assert abs(out.std() - 1) < 1e-6
def test_zscore_returns_same_size(): x = [1, 2, 3, 4, 5] out = stats.z_score(x) assert len(x) == len(out)