Power spectrum of the parameters estimated from the JLA type Ia SN sample (method A). The dashed lines are the mean power spectra from the “Cosmic variance” estimation, the dotted lines are 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 panels: power spectra from the { H₀,Ω_M,Ω_Λ } estimation. Right panels: power spectra from the { H₀,q₀,j₀ } estimation.