Estimation of T₀, γ, σ₈, and n_s using score-compression from IMNN on the Fourier-transformed Lyα forest transmitted flux for three simulations run at fiducial parameter values with different initial random seeds. Each realization in the distribution of the estimated parameters is a bootstrap realization of a sample size of 50 mock spectra over the entire testing set. The distribution of the parameters was generated with 10 000 bootstrap realizations for each parameter. On the left panels, we plot the estimation for simulated sightlines that have the S/N distribution S/N_Fid with IMNN trained with sightlines that have S/N_Fid. On the right panels, we plot the estimation for 0.85 × S/N_Fid with IMNN trained with S/N_Fid sightlines. This shows the sensitivity of the trained NNs to noise level deviations in the data.