def METHOD_NAME():
    sample = EllipseSample(DATA, 40.0)
    sample.update(DEFAULT_FIX)
    assert_allclose(sample.mean, 200.02, atol=0.01)
    assert_allclose(sample.gradient, -4.222, atol=0.001)
    assert_allclose(sample.gradient_error, 0.0003, atol=0.0001)
    assert_allclose(sample.gradient_relative_error, 7.45e-05, atol=1.0e-5)
    assert_allclose(sample.sector_area, 2.00, atol=0.01)