Power spectrum of the parameters estimated from the JLA type Ia SN sample. The dashed lines represent the average power spectra from the cosmic variance estimation, the dotted lines represent the power spectra of the average shuffle SNe estimation, and the solid lines are the unbiased power spectra defined as the difference between the former two. Left panel: power spectra of the matter energy density Ω_M and dark energy density Ω_Λ (estimated parameters), curvature energy density Ω_κ, and the deceleration parameter q₀ (derived parameters). Right panel: power spectrum of the Hubble parameter H₀ (estimated parameter).