850 μm total intensity I vs. polarization fraction P. The green points are the nondebiased, I/σ _I > 3, and σ _I < 5 mJy beam⁻¹ POL-2 polarization measurements. The colored regions are the predicted I − P distributions based on the Bayesian analysis within the 68%, 95%, and 98% confidence regions (CR). The black line indicates the posterior mean. Most of the data points are within the 98% confidence region of our prediction.