Fig. 5.

Prediction error varies with the released points from the public dataset under privacy parameter (ε₁, ε₂, ε₃) = (0.8ε, 0.2ε, ε) where ε = 0.5, 1, 3 from replicating 10 times on the whole procedure. The black dotted curve is the prediction error from the M-estimator from the hybrid datasets without adding noise. The red dotted curve is from the M-estimator from the hybrid datasets under DP. The blue line is from the public dataset. The pink line is from the perturbed private dataset.