Constraint on some of the key parameters of the low-z (left), med-z (middle), and high-z (right) subsamples, using w _p + ξ ₀ + ξ ₂. The contours show 1σ and 2σ confidence levels. The result shows a comparison of three different tests: (1) fiducial test (blue): varying cosmology+HOD+assembly bias parameters with an uninformative prior; (2) adopting a Gaussian prior on a subset of the cosmological parameters (Ω _m , Ω _b , σ ₈, h, n _s ) using the Planck 2018 observation (red); (3) fixing γ _f = 1 with no deviation from GR (black); and (4) fixing w = −1 to be ΛCDM (cyan). The dashed lines for cosmological parameters indicate the best-fit model of Planck with γ _f = 1 and f _env = 0.