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We show how one can demonstrate continuous-variable Einstein-Podolsky-Rosen(EPR) steering without needing to characterize entire measurement probabilitydistributions. To do this, we develop a modified Fano inequality useful fordiscrete measurements of continuous variables, and use it to bound theconditional uncertainties in continuous-variable entropic EPR-steeringinequalities. With these bounds, we show how one can hedge against experimentallimitations including a finite detector size, dead space between pixels, andany such factors that impose an incomplete sampling of the true measurementprobability distribution. Furthermore, we use experimental data from theposition and momentum statistics of entangled photon pairs in parametricdownconversion to show that this method is sufficiently sensitive for practicaluse.

Demonstrating Continuous Variable EPR Steering in spite of Finite Experimental Capabilities using Fano Steering Bounds