Contours of our MCMC analyses for hierarchy 1 Taylor expansions. Best fits (black points), prompted with 1 − σ (darker areas) and 2 − σ (lighter areas) confidence levels, refer to SN+BAO+GRB, in particular: Amati (top left), Ghirlanda (top right), Yonetoku (bottom left), and combo (bottom right) data sets. The results indicate a slight spread when comparing q₀ and j₀ values, with approximatively Gaussian distributions.